feat: implement undwc command

[HeadTriXz]

Part of #24.

• adds a /undwc command.
• improves unflagUser.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01% 🎉

Comparison is base (65b7a91) 98.92% compared to head (c3414f4) 98.93%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
+ Coverage   98.92%   98.93%   +0.01%     
==========================================
  Files         122      123       +1     
  Lines       14869    15034     +165     
  Branches     1579     1592      +13     
==========================================
+ Hits        14709    14874     +165     
  Misses        160      160              

Flag	Coverage Δ
barry	98.53% <100.00%> (+0.02%)	⬆️
core	99.92% <ø> (ø)
logger	100.00% <ø> (ø)

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Files Changed	Coverage Δ
...dules/moderation/commands/chatinput/undwc/index.ts	100.00% <100.00%> (ø)
apps/barry/src/modules/moderation/index.ts	100.00% <100.00%> (ø)

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