fix(golden-layout): exclude test files from build output

[mofojed]

Noticed the test files were being included in golden-layout input. We shouldn't do that.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.77%. Comparing base (6775c43) to head (257cbe0).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2642   +/-   ##
=======================================
  Coverage   49.77%   49.77%           
=======================================
  Files         774      774           
  Lines       43846    43860   +14     
  Branches    11286    11291    +5     
=======================================
+ Hits        21825    21832    +7     
- Misses      21975    22010   +35     
+ Partials       46       18   -28     

Flag	Coverage Δ
unit	49.77% <ø> (+<0.01%)	⬆️

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[Copilot]

Pull request overview

This PR aims to prevent packages/golden-layout test sources and test-only utilities from being included in build artifacts (notably dist/), so they don’t end up in the published package output.

Changes:

• Expanded tsconfig.json exclusions to omit src/__tests__, src/test-utils, and *.test.* files.
• Added a Babel CLI --ignore list to skip compiling test and test-utility sources into dist/.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/golden-layout/tsconfig.json	Excludes test directories/files from TypeScript project inputs.
packages/golden-layout/package.json	Updates Babel build command to ignore tests/test-utils during compilation to dist/.

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[Copilot]

The --ignore patterns are likely not matching the paths Babel sees (Babel’s shared babel.config.js uses globs like **/__mocks__/* and a .test.* regex, i.e. no leading ./ and directory patterns include wildcards). As written, patterns like ./src/test-utils may not exclude files like src/test-utils/testUtils.ts, which would keep test utilities in the published dist/. Consider switching to glob patterns that match subpaths (e.g. src/test-utils/** and src/__tests__/** or **/test-utils/**) and dropping the redundant .test.* ignore since it’s already handled in babel.config.js.

Suggested change

	"build:babel": "babel ./src --out-dir ./dist --extensions \".ts,.js,.tsx,.jsx\" --source-maps --root-mode upward --ignore \"./src/__tests__,./src/test-utils,./src/**/*.test.*\""
	"build:babel": "babel ./src --out-dir ./dist --extensions \".ts,.js,.tsx,.jsx\" --source-maps --root-mode upward --ignore \"src/__tests__/**,src/test-utils/**\""

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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