Respect .styluaignore in language server mode

[JohnnyMorganz]

Fixes #1035

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.57%. Comparing base (5a9152d) to head (6893d78).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1037   +/-   ##
=======================================
  Coverage   96.56%   96.57%           
=======================================
  Files          16       16           
  Lines        5236     5250   +14     
=======================================
+ Hits         5056     5070   +14     
  Misses        180      180           

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