Increase meta coverage

[slmnio]

The metadata system that provides embed information for services like Discord works pretty well (though could maybe do with including more sites/bots)

It's lacking a lot of coverage of the site and it's not much more than flavour text at this point. A good overhaul should:

• [ ] Part 0: Provide a tree of all requests that could return different results.
• [ ] Part 1: Provide metadata to any valid SLMN.GG link
• [ ] Part 2: Provide useful and human-like responses with data.

By human-like, I mean proper sentences with things like "Atomic is a team from BPL Season 3, captained by Xi. The roster is: Xi, CuteWhiteBoi, Rapha, Varity, Khan, Osiren, Interflux and Doc." and so on

[slmnio]

• [ ] /
• [ ] /events
• [ ] /event/:id
  • [x] /event/
  • [ ] /event/rosters
  • [ ] /event/bracket
  • [ ] /event/brackets (redirect to /bracket - is this something meta should handle?)
  • [ ] /event/schedule
  • [ ] /event/matches (redirects to /schedule)
  • [ ] /event/scenarios
  • [ ] /event/draft
  • [ ] /event/staff
  • [ ] /event/about
  • [ ] /event/standings
• [ ] /teams
• [ ] /team/:id
  • [ ] /team/
  • [ ] /team/matches
  • [ ] /team/theme
  • [ ] /team/details
  • [ ] /team/composition
• [ ] /players
• [ ] /player/:id
  • [x] /player/
  • [ ] /player/casts
  • [ ] /player/news
  • [ ] /player/matches
  • [ ] /player/played-matches
• [ ] /match/:id
  • [x] /match/
  • [ ] /match/history
• [x] /detailed/:id
• [x] /news/:slug