chore: Release languagetool-rust version 3.0.0

[jeertmans]

No bugs or issues have been reported since the pre-release was published, so I'm assuming we can move on and finally publish v3!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 31.25%. Comparing base (077637b) to head (5d75cf9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #173   +/-   ##
=======================================
  Coverage   31.25%   31.25%           
=======================================
  Files          19       19           
  Lines         819      819           
=======================================
  Hits          256      256           
  Misses        563      563           

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[codspeed-hq]

CodSpeed Performance Report

Merging #173 will not alter performance

_{Comparing release-3.0.0 (5d75cf9) with main (077637b)}

Summary

✅ 6 untouched