ci: add frontend test and build workflow with label reporting

[Atharva0506]

Addressed Issues:

Fixes #(TODO:issue number)

Screenshots/Recordings:

TODO: If applicable, add screenshots or recordings that demonstrate the interface before and after the changes.

Additional Notes:

This PR introduces an automated GitHub Actions workflow to run testing and builds strictly for changes made to the frontend/ directory.

• It dynamically adds a test case failing label to the PR if npm run test:ci fails, and comments with the test output/metrics.
• If the tests pass, it automatically removes the test case failing label.
• It also runs npm run build and automatically comments on the PR with the bundle size metrics. If the build fails, it applies a build failed label.

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📥 Commits

Reviewing files that changed from the base of the PR and between 584c0dc and 27288f4.

📒 Files selected for processing (1)

• .github/workflows/test.yml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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