feat(GuildMember): Banners

[Jiralite]

Please describe the changes this PR makes and why it should be merged:

• Add guild member banners discord/discord-api-docs#6986

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating
• This PR changes the library's interface (methods or parameters added)

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
discord-js	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 21, 2024 10:45pm
discord-js-guide	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 21, 2024 10:45pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.49%. Comparing base (6cbe248) to head (2e13d8b).

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #10384       +/-   ##
===========================================
+ Coverage   38.01%   49.49%   +11.47%     
===========================================
  Files         239      228       -11     
  Lines       15471    19510     +4039     
  Branches     1353     1141      -212     
===========================================
+ Hits         5881     9656     +3775     
- Misses       9575     9810      +235     
- Partials       15       44       +29     

Flag	Coverage Δ
guide	0.54% <ø> (ø)

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