Add a general article on osu! forums. Add forum-specific stubs

wiki/Community/Forum/Feature_Requests/en.md

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+---
+stub: true
+---
+
+# Feature Requests
+
+[**Feature Requests**](https://osu.ppy.sh/community/forums/4) is a forum created for suggestions regarding osu!. Users can promote feature requests and increase their priority by [spending stars](/wiki/Modding/Star_priority) obtained with [osu!support](/wiki/osu!support).<!-- TODO: part of Modding/Star_priority belongs here -->
+
+Nowadays, the Feature Requests forum is obsolete, and has been mostly replaced by the [GitHub Discussions](https://github.com/ppy/osu/discussions) flow.

wiki/Community/Forum/Help/en.md

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+---
+stub: true
+---
+
+# Help
+
+*See also: [Help Centre](/wiki/Help_Centre)*
+
+<!-- TODO: mention issue labels? -->
+
+[**Help**](https://osu.ppy.sh/community/forums/5) is a forum where players can receive technical support from [Support Team](/wiki/People/The_Team/Support_Team) members as well as regular users.

wiki/Community/Forum/Modding_Queues/en.md

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+---
+stub: true
+---
+
+# Modding Queues
+
+<!-- TODO: this needs to be linked from other related articles, for example, "how to get mods" -->
+
+[**Modding Queues**](https://osu.ppy.sh/community/forums/60) is a forum dedicated to [beatmap review](/wiki/Modding) requests, or mods. It consists of forum threads, or *queues* belonging to different modders and mappers. Every queue has individual requirements and limits on obtaining the mods, which must be respected by visitors in order to receive a mod.
+
+Each game mode has its own subforum for queues, with osu! taking up the main section of the forum:
+
+- [osu!](https://osu.ppy.sh/community/forums/60)
+- [osu!taiko](https://osu.ppy.sh/community/forums/121)
+- [osu!catch](https://osu.ppy.sh/community/forums/122)
+- [osu!mania](https://osu.ppy.sh/community/forums/123)
+
+## Queue rounds
+
+To keep their workload at an appropriate level, most modders only accept requests during short periods called rounds. Before the start of every round, the queue's owner posts a short announcement, which typically contains:
+
+- The number of maps that may be accepted in this round
+- Requirements specific to the current round
+- Whether the mods are regular (normal or *NM*), or ["mod for mod" (*M4M*)](/wiki/Modding/Mod_for_mod), where a mod in return is expected
+- Other information relevant to modding
+
+Once enough requests are left in the thread, the modder will post a short message saying which beatmaps were accepted for modding. After that, the queue is said to be closed until the next round, while the owner mods the requested maps.

wiki/Community/Forum/Off-Topic/en.md

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+---
+stub: true
+---
+
+# Off-Topic
+
+<!-- TODO: A LOT could be written here: https://github.com/ppy/osu-wiki/issues/2804 -->
+
+[**Off-Topic**](https://osu.ppy.sh/community/forums/52) is a forum meant for the community to have conversations without any particular topic in focus. Threads can often be random, change topic, and/or have multiple topics simultaneously. Topics can range anything from daily life, opinions about the game, role play, jokes and meta content, nonsense, or anything in between.

wiki/Community/Forum/en.md

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+---
+tags:
+  - forums
+  - subforum
+---
+
+# Forum
+
+*See also: [Internet forum](https://en.wikipedia.org/wiki/Internet_forum)*
+
+[The osu! **forums**](https://osu.ppy.sh/community/forums) are a place for conversations where messages are grouped by subjects, and no quick response is expected. The discussions are searchable, stored forever, and may be revisited at any time, which makes them different from the near-instant messages in [osu! chat](/wiki/Community/Internet_Relay_Chat). As a result, forum messages are longer, contain more information, and typically provide more details than chat messages would.
+
+The osu! forums provide features similar to most internet forums: [BBCode](/wiki/BBCode) markup, polls, pins and subscriptions, private messages, and [moderation](#moderation).
+
+## Structure
+
+Each of the osu! forums contains a variety of **topics**, sometimes called threads, as well as smaller categories, or **subforums**. Most of the forums are English only, but there also exists a number of [language-specific](https://osu.ppy.sh/community/forums#forum-23) forums for local communities that are large enough.
+
+While some forums, such as [Mapping Discussion](https://osu.ppy.sh/community/forums/56), have specific requirements or guidelines, all of them follow [the community rules](/wiki/Rules).
+
+## Roles and user groups
+
+Some users may belong to one or several custom groups, based on their community tasks, access rights, or past activity. A full list of user groups can be found at [The Team § User groups](/wiki/People/The_Team#user-groups).
+
+In addition to user group badges provided by group membership, users may have [custom user titles](/wiki/User_title) displayed under the avatar in each of their posts.
+
+### Moderation
+
+*See also: [Reporting bad behaviour § Forum](/wiki/Reporting_Bad_Behaviour#forum)*
+
+[Moderators](/wiki/People/The_Team/Global_Moderation_Team) are users who keep the forums clean and appropriate, and answer concerns related to that. Moderators can edit or delete inappropriate posts or topics, pin topics and move them between different forums, and temporarily prevent offenders from posting by [silencing](/wiki/Silence) them.
+
+## Special forums
+
+Some of the forums have different purposes that are not limited to discussion. As a result, they have extra rules and/or technical capabilities.
+
+- [Help](/wiki/Community/Forum/Help): technical support from the [Support Team](/wiki/People/The_Team/Support_Team) and regular users.
+- [Feature Requests](/wiki/Community/Forum/Feature_Requests): suggestions for osu! development.
+- [Modding Queues](/wiki/Community/Forum/Modding_Queues): beatmap reviews done by other mappers and modders.
+- [Off-Topic](/wiki/Community/Forum/Off-Topic): the place for the not-so-logical discussions.
+- [Abandoned Wasteland](/wiki/Community/Forum/Abandoned_Wasteland): the storage for useless topics.
+
+Additionally, there are other forums similar to Abandoned Wasteland, which serve technical or managerial purposes and are therefore hidden from the general public.
+
+## History
+
+[The first public forum post](https://osu.ppy.sh/community/forums/topics/2) is dated August 28, 2007, and belongs to [peppy](/wiki/People/peppy). During that time, the osu! website used [phpBB](https://en.wikipedia.org/wiki/PhpBB) as its forum engine, which over the years has been significantly expanded to suit the game and community's needs. Some of its customisations included:
+
+- Integration with the [beatmap submission system](/wiki/Submission)
+- The [kudosu](/wiki/Kudosu) and [beatmap ranking](/wiki/Beatmap_ranking_procedure) systems
+- [Help](/wiki/Community/Forum/Help) and [Feature Requests](/wiki/Community/Forum/Feature_Requests) forums
+- [osu!supporter](/wiki/osu!supporter) and user pages
+
+After the new osu! website was brought up and running, phpBB had been slowly phased out in favour of the custom forum engine used today.

wiki/redirect.yaml

@@ -88,10 +88,19 @@
 "difficulties":                      "Beatmap/Difficulty"
 
 "community_mentorship_program": "Community/Community_Mentorship_Program"
-"project_loved":                "Community/Project_Loved"
+"AW":                           "Community/Forum/Abandoned_Wasteland"
+"abandoned_wasteland":          "Community/Forum/Abandoned_Wasteland"
+"forum":                        "Community/Forum"
+"forums":                       "Community/Forum"
+"modding_queue":                "Community/Forum/Modding_Queues"
+"modding_queues":               "Community/Forum/Modding_Queues"
+"OT":                           "Community/Forum/Off-Topic"
+"off-topic":                    "Community/Forum/Off-Topic"
+"offtopic":                     "Community/Forum/Off-Topic"
 "osu!_community_meetings":      "Community/osu!_community_meetings"
 "osu!dev_discord_server":       "Community/osu!dev_Discord_server"
 "organisations":                "Community/Organisations"
+"project_loved":                "Community/Project_Loved"
 "osu!talk":                     "Community/Video_series/osu!talk"
 "osu!mapping":                  "Community/Video_series/osu!mapping"