feat(types): Add PIN_MESSAGES permission

[Fleny113]

• upstream: docs: Document Pin Messages permission discord/discord-api-docs#7766
• fixes [api-docs] docs: Document Pin Messages permission #4384

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.95%. Comparing base (590653f) to head (343e72d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4390   +/-   ##
=======================================
  Coverage   77.95%   77.95%           
=======================================
  Files         265      265           
  Lines       30099    30101    +2     
  Branches      553      553           
=======================================
+ Hits        23464    23466    +2     
  Misses       6626     6626           
  Partials        9        9           

Flag	Coverage Δ		*Carryforward flag
bot	60.34% <ø> (ø)
bot-e2e	60.29% <ø> (ø)		Carriedforward from 590653f
bot-unit	56.72% <ø> (ø)
discordeno	100.00% <ø> (ø)
discordeno-unit	100.00% <ø> (ø)
gateway	59.51% <ø> (ø)
gateway-integration	59.51% <ø> (ø)
gateway-unit	29.30% <ø> (ø)
rest	81.97% <100.00%> (ø)
rest-e2e	27.15% <ø> (+<0.01%)	⬆️	Carriedforward from 590653f
rest-unit	69.98% <100.00%> (ø)
types	100.00% <100.00%> (ø)
types-unit	100.00% <100.00%> (ø)
utils	81.96% <ø> (ø)
utils-unit	81.96% <ø> (ø)

*This pull request uses carry forward flags. Click here to find out more.

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[lts20050703]

LGTM!