Move Discord Bot app to main commonwealth package

[timolegros]

Link to Issue

Closes: #9392

Description of Changes

• Created the DiscordBotPolicy which handles messages from the MessageRelayer and replaces the discord-consumer and the discord bot integration API
• Moved the discord listener to a worker in the main commonwealth app
• Created proper event pipelines for each Discord bot event message type

Test Plan

1. Add DiscordThreadCreated,DiscordThreadBodyUpdated,DiscordThreadTitleUpdated,DiscordThreadDeleted,DiscordThreadCommentCreated,DiscordThreadCommentUpdated,DiscordThreadCommentDeleted to ALLOWED_EVENTS in .env.
2. In packages/commonwealth execute:
   • pnpm start
   • pnpm start-message-relayer
   • pnpm start-discord-listener
   • pnpm start-consumer
3. In the app link one of your communities + topics to a discord server
4. CRUD threads and comments in Discord and check that each operation is correctly synced to the commonwealth forum

Deployment Plan

1. Delete both Heroku discord bot apps
2. DiscordThreadCreated,DiscordThreadBodyUpdated,DiscordThreadTitleUpdated,DiscordThreadDeleted,DiscordThreadCommentCreated,DiscordThreadCommentUpdated,DiscordThreadCommentDeleted to ALLOWED_EVENTS
3. Ensure DISCORD_TOKEN and DISCORD_CLIENT_ID env var are set in all Heroku env
4. Remove CW_BOT_KEY environment variable

Other Considerations

[Rotorsoft]

A few issues when trying to test this:

• Remove discord-bot/tsconfig.build.json from main package.json
• Note that these scripts are inside commonwealth, I usually run: p -F commonwealth start-message-relayer
  • pnpm start-message-relayer
  • pnpm start-discord-listener
  • pnpm start-consumer
• Need to add new events to .env allowed events

[timolegros]

A few issues when trying to test this:

* Remove discord-bot/tsconfig.build.json from main package.json

* Note that these scripts are inside commonwealth, I usually run: `p -F commonwealth start-message-relayer`
  
  * pnpm start-message-relayer
  * pnpm start-discord-listener
  * pnpm start-consumer

* Need to add new events to .env allowed events

fixed

[Rotorsoft]

Tested adding, editing, removing discord posts and comments... works as expected 👍