feat: implement loading gif for leaderboard

[HeadTriXz]

Adds a (somewhat) nice gif for loading leaderboards.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a8a41e5) 99.16% compared to head (3fbc08b) 99.16%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #93      +/-   ##
==========================================
- Coverage   99.16%   99.16%   -0.01%     
==========================================
  Files         182      182              
  Lines       20345    20374      +29     
  Branches     2242     2248       +6     
==========================================
+ Hits        20175    20203      +28     
- Misses        170      171       +1     

Flag	Coverage Δ
barry	98.95% <100.00%> (-0.01%)	⬇️
core	99.92% <ø> (ø)
logger	100.00% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
apps/barry/src/config.ts	98.90% <ø> (-1.10%)	⬇️
...s/leveling/commands/chatinput/leaderboard/index.ts	100.00% <100.00%> (ø)
apps/barry/src/utils/pagination.ts	100.00% <100.00%> (ø)

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