Is your feature request related to a problem? Please describe.

Our /lgtm determination thing is in inlined javascript. This rather difficult to maintain and even worse to test.

We should switch it to Javascript and write tests for it.

Describe the solution you'd like

File:
.github/scripts/lgtm-processor.js
.github/scripts/lgtm-processor-test.js

Reference:

        id: compute
        uses: actions/github-script@v8
        env:
          # anything that's required here
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const script = await import('${{ github.workspace }}/.github/scripts/lgtm-processor.js');
            await script.default({ core, github, context });

The script would have a proper test to make sure parsing and folder handling works as expected.

Describe alternatives you've considered

Additional context