Add A-B lettered article stubs from glossary

[Pennek]

This splits the following glossary entries into their own articles:

• Abandoned Wasteland
• Accuracy (small changes to existing article)
• AFK
• Authentic
• Aspire
• Bancho (Chat) Add Article Stubs (Community) #3150
• Beat
• Time-distance Equality Add Article Stubs (Beatmaps) #3151
• BeatmapID
• BeatmapSetID
• Bit Rate
• Background/BG
• Blanket
• Break Add Article Stubs (Beatmaps) #3151

[cl8n]

super super skimmed for now

• none of these should be under Glossary if we're trying to make proper top-level categories
• my suggestions about tags apply to wherever those issues exist, i didnt comment on all of them cuz it's same thing (if all parts of the tag exist in the title, you don't need it)

[Pennek]

I basically haven't touched categorization here since I was unsure of what we were going to do anyways. If you have any suggestions I'd be happy to hear them.

[TPGPL]

i would consider removing AFK as an article completely, as it's a general Internet term. I don't see a reason for it to be on osu! wiki

[MilkyIQ]

Mostly just formatting changes

[MegaApplePi]

@Pennek Are you going to resolve the conflict for Gameplay/Accuracy

[cl8n]

Bit rate doesn't seem like a useful article for osu wiki, it only comes up in small remarks about other topics that wouldn't need more than inline explanation