STRWEB-158 Exclude consumer test files from type checking

[alb3rtino]

https://folio-org.atlassian.net/browse/STRWEB-158

Purpose

webpack/tsconfig.json extends include four levels up (../../../../src/**/*.ts(x)) to cover a consuming project's source tree, but exclude is not extended to the same depth. As a result, consumer test files under src/ (e.g. src/components/Foo/Foo.test.tsx) are pulled into the type-check program created by fork-ts-checker-webpack-plugin. A type-only issue in such a file blocks stripes build, even though the consumer's own tsc may pass. Test files are not part of the production bundle, so including them in the build's type-check program adds little value while creating friction. Excluding them keeps responsibilities cleanly separated between stripes build and the consumer's own tsc --noEmit / yarn test.

Approach

Add ../../../../src/**/*.test.ts and ../../../../src/**/*.test.tsx to the exclude list in webpack/tsconfig.json to match the depth of the existing include patterns.

[github-actions]

Jest Unit Test Results

0 tests  ±0   0 ✅ ±0   0s ⏱️ ±0s
0 suites ±0   0 💤 ±0 
0 files   ±0   0 ❌ ±0 

Results for commit a40b9dc. ± Comparison against base commit 512a0d2.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud