Commit for 2.4.0

[fdnt7]

Lyra is now open sourced with the GPL-3.0 license

The lyra reposity now have a sponsor button, linked to Teammie's ko-fi

? minor .gitignore & .dockerignore changes

• changes and organized imports

• abolished the usage of global keywords
  | + added globs.py to implement global namespace

• updated README to fit the new changes
  | + added badges
  | + added lyra icon
• systematize type checking strictness
  | * #type: ignore -> #pyright: ignore [specific-check]
  | + #pyright: reportUnusedImport=false for exportint modules

Changed DB option from Firebase to MongoDB

? Updated requirements.txt
? Improved code style & removed unused code

• More logging
  | + logging when fetched emojis from the emoji server
  | + logging when connected to lavalink server
  | + logging when connected to db
  | + lgfmt()
  / extras.py -> extras.py, _extras_types.py, _extras_untyped.py, _extras_vars.py
  / lavaimpl.py -> lavaimpl.py, lavautils.py
  / music.py -> music.py, musicutils.py

Changed command check system to tanjun's checks

| / checks.py -> compose.py, flags.py
| + composed() to compose decorator
| + Binds to implement confirm prompt, auto connect vc and voting prompt
/ split modules' code into lib
| / connections
| / playback
| / queue
/ Moved libs' internal constants to consts.py
| + Documentation for each consts in consts.py
/ utils.suppress_embeds is now in base hook's pre_execution
#+ Lyra now have an official version number for each release
#! Limit now playing's thumbnail image to be under server's upload size limit

Unplayable tracks will now be removed instead of skipped

| #+ they will also be remembered to be automatically removed the next time it has been enqueued

• NoPlayableTracks error

Allow multiple mentionables to be in /restrict add~remove

#+ New command group: misc
| #~ /ping is now in misc

• Utilises personalized Type aliases
  | * t.Optional[...] -> Option[...]
  | + Result[...]
  #+ More features on /play command
  | Support for playing local files
  || /play-file
  || attaching files upon using message command ,,play
  || attaching files in a message and right click to use the message menu
  | Support for adding multiple songs at once, separated by |. ex. A | B
  #+ New command alias for ,,leave : eddisntheregoaway (Inside-joke from the Oshi No Ko Server)

• shell scripts in scripts will now have no .sh extension

• ,,delete_all_app_commands debug command