chore: migrate from npm to pnpm

.github/workflows/deploy.yml

@@ -22,17 +22,22 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 11
+
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
           node-version: '20'
-          cache: 'npm'
-      
+          cache: 'pnpm'
+
       - name: Install dependencies
-        run: npm ci
-      
+        run: pnpm install --frozen-lockfile
+
       - name: Build
-        run: npm run build
+        run: pnpm build
       
       - name: Setup Pages
         uses: actions/configure-pages@v4