chore!: remove deprecated joinPaths in favor of join

[susnux]

As we need a new major anyways we can drop the deprecated alias.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.10%. Comparing base (a0dcea5) to head (5c5eb0a).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #844      +/-   ##
==========================================
- Coverage   92.30%   92.10%   -0.21%     
==========================================
  Files           1        1              
  Lines          39       38       -1     
  Branches        8        8              
==========================================
- Hits           36       35       -1     
  Misses          3        3              

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