add section headings to keybinding suggestions

[haberdashPI]

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[codecov]

Codecov Report

❌ Patch coverage is 93.54839% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.11%. Comparing base (5a64256) to head (5a7c335).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/extension/commands/palette.ts	91.83%	8 Missing ⚠️
src/rust/parsing/src/docs.rs	95.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #105       +/-   ##
===========================================
+ Coverage   52.38%   88.11%   +35.72%     
===========================================
  Files          35       35               
  Lines        8277     8404      +127     
  Branches      595      615       +20     
===========================================
+ Hits         4336     7405     +3069     
+ Misses       3941      999     -2942     

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