chore: add copilot-setup-steps.yml with impeccable skill

Author: Copilot

.github/workflows/copilot-setup-steps.yml

@@ -0,0 +1,36 @@
+name: "Copilot Setup Steps"
+
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+  pull_request:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+
+jobs:
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v6
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: "24"
+          cache: pnpm
+
+      - name: Install project dependencies
+        run: pnpm install
+
+      - name: Install impeccable
+        run: npm install -g impeccable