docs: Add missing documentation comments to multiple utility functions

[weiyunpeng]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 241 lines in your changes are missing coverage. Please review.

Project coverage is 14.20%. Comparing base (d7e7647) to head (bf1e60e).

Files	Patch %	Lines
src/editor/editor-api/VSCodeAction.ts	0.00%	135 Missing ⚠️
src/extension.ts	0.00%	43 Missing ⚠️
src/editor/webview/AutoDevWebviewViewProvider.ts	0.00%	29 Missing ⚠️
src/context.ts	0.00%	20 Missing ⚠️
pre-download-build.js	0.00%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #34      +/-   ##
==========================================
- Coverage   14.31%   14.20%   -0.11%     
==========================================
  Files         321      321              
  Lines       30644    30876     +232     
  Branches      822      822              
==========================================
  Hits         4386     4386              
- Misses      26258    26490     +232     

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