feat: add unit tests for discord invite resolver

[pajlada]

Pull request checklist:

• CHANGELOG.md was updated, if applicable

Description

The intent of this PR is just to add unit tests to the Discord invite resolver. However, as an unrelated change, we now sort the discord server features (Server Perks) alphabetically, this made testing it a bit easier and I don't think its a bad thing for it to be stable

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.01%. Comparing base (0406c4f) to head (fafdb9d).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #711      +/-   ##
==========================================
+ Coverage   48.92%   51.01%   +2.09%     
==========================================
  Files         109      109              
  Lines        4100     4118      +18     
==========================================
+ Hits         2006     2101      +95     
+ Misses       2025     1944      -81     
- Partials       69       73       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[pajlada]