Update README to add official forum [skip-ci]

Author: DogmaDragon

README.md

@@ -1,4 +1,8 @@
 # StashDB-Docs
 
 ## This repo is primarily used to host our StashDB guidelines. If you are looking for the old guidelines wiki, all content has been moved to this new website, linked below:
-https://guidelines.stashdb.org/
+https://guidelines.stashdb.org/
+
+## Join Our Community
+
+We are excited to announce that we have a new home for support, feature requests, and discussions related to Stash and its associated projects. Join our community on the [Discourse forum](https://discourse.stashapp.cc) to connect with other users, share your ideas, and get help from fellow enthusiasts.