ci: enable codecov coverage upload

.codecov.yml

@@ -0,0 +1,9 @@
+codecov:
+  require_ci_to_pass: true
+  notify:
+    wait_for_ci: true
+
+coverage:
+  status:
+    project: off
+    patch: off

.github/workflows/ci.yml

@@ -68,4 +68,8 @@ jobs:
         run: pnpm run build
 
       - name: Test
-        run: pnpm run test
+        run: pnpm run test:coverage
+
+      - uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

package.json

@@ -36,6 +36,7 @@
     "dev": "unbuild --stub",
     "prepublishOnly": "pnpm run build",
     "test": "vitest",
+    "test:coverage": "vitest run --coverage",
     "new": "node --experimental-specifier-resolution=node --loader ts-node/esm ./scripts/new-rule.ts",
     "docs": "vitepress dev docs",
     "docs:build": "pnpm run generate && vitepress build docs",
@@ -65,6 +66,7 @@
     "@typescript-eslint/eslint-plugin": "6.19.1",
     "@typescript-eslint/parser": "6.19.1",
     "@typescript-eslint/rule-tester": "6.19.1",
+    "@vitest/coverage-v8": "^1.2.2",
     "bumpp": "9.3.0",
     "debug": "4.3.4",
     "eslint": "8.56.0",