⚡ Use mold instead of ld for faster link times

[marcelwa]

Description

Use mold instead of ld for faster link times.

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[codecov]

Codecov Report

Merging #210 (78267c3) into main (a994d21) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #210   +/-   ##
=======================================
  Coverage   94.25%   94.25%           
=======================================
  Files          82       82           
  Lines        7362     7362           
=======================================
  Hits         6939     6939           
  Misses        423      423           

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