🔧 Add copilot-setup-steps.yml workflow for GitHub Copilot coding agent

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

@@ -0,0 +1,77 @@
+name: Copilot Setup Steps
+
+# This workflow is designed to be referenced by GitHub Copilot
+# to understand how to set up the development environment
+
+on:
+  workflow_dispatch:
+
+jobs:
+  setup:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.11"
+        cache: pip
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: "20"
+        cache: npm
+
+    - name: Upgrade pip
+      run: |
+        python -m pip install --upgrade pip
+
+    - name: Install uv (optional, for faster package management)
+      run: |
+        pip install uv
+
+    - name: Install pre-commit and pre-commit-uv
+      run: |
+        pip install pre-commit pre-commit-uv
+
+    - name: Install tox and tox-uv
+      run: |
+        pip install tox tox-uv
+
+    - name: Install project dependencies
+      run: |
+        pip install -e .[testing,code-style]
+
+    - name: Install Node.js dependencies (for SASS compilation)
+      run: |
+        npm install
+
+    - name: Setup pre-commit hooks
+      run: |
+        pre-commit install
+
+    - name: Verify installations
+      run: |
+        echo "Python version:"
+        python --version
+        echo ""
+        echo "Node.js version:"
+        node --version
+        echo ""
+        echo "npm version:"
+        npm --version
+        echo ""
+        echo "pre-commit version:"
+        pre-commit --version
+        echo ""
+        echo "tox version:"
+        tox --version
+        echo ""
+        echo "Installed Python packages:"
+        pip list | grep -E "(pre-commit|tox|sphinx|pytest)"