feat: Add music system

[DA-344]

Summary

Adds a Music cog, with related, using wavelink

Environ variables need to be updated

Checklist

• If code changes were made, then they have been tested.
• This PR fixes an issue.
• This PR adds something new (e.g. new commands or modules).
• This PR is a breaking change (e.g. commands or modules renamed or removed).
• This PR is not a code change (e.g. documentation, docstrings, README, changelog, ...).
• I have searched for duplicates.
• If type: ignore, pyright: ignore, or similar, were used, then a comment explaining why was also left.
  • I have formatted the code using black==25.1.0.