ci: migrate all workflows to pnpm, upgrade @vitejs/plugin-react to v6

- Replace npm ci with pnpm install --frozen-lockfile in all 5 workflows
- Add pnpm/action-setup@v4 step to lint, format, testing, release, publish
- Upgrade @vitejs/plugin-react 4.7.0 -> 6.0.1 (supports vite 8)
- Add @rolldown/plugin-babel as required peer dependency
- Remove package-lock.json (project uses pnpm-lock.yaml)

.github/workflows/format.yaml

@@ -1,29 +1,34 @@
-name: Check formatting
-
-on:
-  pull_request:
-    branches: [main]
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  check:
-    name: Prettier Format Check
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20
-          cache: 'npm'
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Run format check
-        run: npm run format
+name: Check formatting
+
+on:
+  pull_request:
+    branches: [main]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check:
+    name: Prettier Format Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'pnpm'
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Run format check
+        run: pnpm run format