feat: add support for user-installable apps

[HeadTriXz]

• Updates the @discordjs/ packages to the dev release.
• Adds the option to make user-installable apps.
• Deprecates guildOnly (replaced by contexts).

[codecov]

Codecov Report

Attention: Patch coverage is 94.40994% with 9 lines in your changes missing coverage. Please review.

Project coverage is 98.74%. Comparing base (94d237a) to head (d4be8c6).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...odules/general/commands/chatinput/reverse/index.ts	0.00%	3 Missing ⚠️
...odules/general/commands/chatinput/convert/index.ts	0.00%	2 Missing ⚠️
...dules/moderation/commands/chatinput/cases/index.ts	0.00%	2 Missing ⚠️
...moderation/commands/chatinput/cases/notes/index.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #120      +/-   ##
==========================================
- Coverage   98.76%   98.74%   -0.02%     
==========================================
  Files         206      206              
  Lines       22686    22792     +106     
  Branches     2490     2494       +4     
==========================================
+ Hits        22405    22506     +101     
- Misses        279      284       +5     
  Partials        2        2              

Flag	Coverage Δ
barry	98.48% <91.81%> (-0.03%)	⬇️
core	99.83% <100.00%> (+<0.01%)	⬆️

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