ci: bring back node setup action

.github/actions/setup/action.yml

@@ -0,0 +1,48 @@
+name: Setup node and pnpm
+description: Configure the Node.js and pnpm versions
+
+inputs:
+  node-version:
+    description: 'The Node.js version to use'
+    required: true
+    default: 22.6.2
+  pnpm-version:
+    description: 'The pnpm version to use'
+    required: true
+    default: 9.7.1
+
+runs:
+  using: composite
+  steps:
+    # https://github.com/actions/virtual-environments/issues/1187
+    - name: tune linux network
+      shell: bash
+      run: sudo ethtool -K eth0 tx off rx off
+
+    - name: Setup Node@${{ inputs.node-version }}
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ inputs.node-version }}
+
+    - name: Install pnpm
+      uses: pnpm/action-setup@v4
+      with:
+        version: ${{ inputs.pnpm-version }}
+        run_install: false
+
+    - name: Get pnpm store directory
+      shell: bash
+      run: |
+        echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
+
+    - name: Setup pnpm cache
+      uses: actions/cache@v4
+      with:
+        path: ${{ env.STORE_PATH }}
+        key: pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          pnpm-store-
+          pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+
+    - shell: bash
+      run: pnpm install