ci: add Codecov coverage reporting

Install @vitest/coverage-v8 and configure deploy workflow to generate and upload test coverage to Codecov using OIDC authentication.

Author: fullstackjam

.github/workflows/deploy.yml

@@ -8,6 +8,9 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
     steps:
       - uses: actions/checkout@v4
 
@@ -19,8 +22,17 @@ jobs:
       - name: Install dependencies
         run: npm install --legacy-peer-deps
 
-      - name: Run tests
-        run: npm run test:run
+      - name: Run tests with coverage
+        run: npm run test:coverage
+      
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          use_oidc: true
+          files: ./coverage/coverage-final.json
+          flags: unittests
+          name: openboot-web-coverage
+          fail_ci_if_error: false
 
       - name: Build
         run: npm run build

package-lock.json

@@ -20,6 +20,7 @@
 		"@sveltejs/kit": "^2.50.1",
 		"@sveltejs/vite-plugin-svelte": "^6.2.4",
 		"@testing-library/svelte": "^5.3.1",
+		"@vitest/coverage-v8": "^4.0.18",
 		"@vitest/ui": "^4.0.18",
 		"fuse.js": "^7.1.0",
 		"happy-dom": "^20.6.1",