Add local setup action for Node.js and pnpm

Author: jdalton

.github/actions/setup-pnpm/action.yml

@@ -0,0 +1,25 @@
+name: 'Setup'
+description: 'Setup Node.js and PNPM for Socket CLI'
+
+inputs:
+  node-version:
+    description: 'Node.js version'
+    required: false
+    default: '22'
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Setup Node.js
+      uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
+      with:
+        node-version: ${{ inputs.node-version }}
+
+    - name: Setup PNPM
+      uses: pnpm/action-setup@fe02b34f77f8bc703788d5817da081398fad5dd2 # v4.0.0
+      with:
+        version: '^10.16.0'
+
+    - name: Install dependencies
+      shell: bash
+      run: pnpm install