Change LFG system over to forum channels

[Kigstn]

Ideas:

• Tags (max. 10) for the type of activity:

1. Raid
2. Dungeon
3. PvE
4. PvP
5. Other

• Archive posts when they have started

• Activity name as title

• Format message so that the message preview only shows

1. Emoji fullness indictor
2. Start time
3. Relative start time

• Add activity image to post (as embed thumbnail)

• Pin explanatory message or use the forum channel guidelines option, depending on how that will look

• Disallow creating posts

• Disallow reacting with emojis on the main message

• React with the number of missing players (max. 9, min :full:)

• Contemplate using headings / lists / normal text instead of embed

• channel context menus to create / edit /delete events