Tracking issue: Threads

[Erk-]

Docs: https://github.com/discord/discord-api-docs/pull/2855

Todo:

• [x] Model
  • [x] Channel (#805)
  • [x] New fields: member_count, message_count, thread_metadata
  • [x] #974 (#1025)
  • [x] Channel Type (#805)
  • [x] GUILD_NEWS_THREAD (10)
  • [x] GUILD_PRIVATE_THREAD (11)
  • [x] GUILD_PUBLIC_THREAD (12)
  • [x] Message (#805)
  • [x] new field: thread
  • [x] Message Flags (#805)
  • [x] HAS_THREAD (1 << 5)
  • [x] Message Type (#805)
  • [x] THREAD_CREATED (18)
  • [x] THREAD_STARTER_MESSAGE (21)
  • [x] Thread Metadata object (#805)
  • [x] Thread Member object
  • [x] Gateway
  • [x] Update fields received (#805)
  • [x] Events (#805)
    • [x] THREAD_CREATE
    • [x] THREAD_DELETE
    • [x] THREAD_LIST_SYNC
    • [x] THREAD_MEMBERS_UPDATE
    • [x] THREAD_MEMBER_UPDATE
    • [x] THREAD_UPDATE
  • [x] Guild
  • [x] new field: threads (Guild only; not PartialGuild) (#805)
    • available on GUILD_CREATE
  • [x] #968
• [x] HTTP
  • [x] #972
  • [x] #971
  • [x] #973
  • [x] #970

[zeylahellyer]

Looking at the PR, v9 appears to entirely be about threads. I'll be updating this tracking issue with additional information.

[zeylahellyer]

Closing in favor of the project: https://github.com/twilight-rs/twilight/projects/6