Relocate JavaScript coverage export under web (#266)

.github/workflows/javascript.yml

@@ -0,0 +1,42 @@
+name: JavaScript
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v5
+    - name: Set up Node.js 20
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+    - name: Install dependencies
+      run: npm install
+      working-directory: web
+    - name: Run JavaScript tests
+      run: npm test
+      working-directory: web
+    - name: Upload coverage to Codecov
+      if: always()
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: web/reports/javascript-coverage.json
+        flags: javascript
+        name: javascript
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+    - name: Upload test results to Codecov
+      uses: codecov/test-results-action@v1
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: web/reports/javascript-junit.xml
+        flags: javascript