add copilot setup steps (#41369)

* copilot setup

* add index-url to allowlist so we can install pylint-guidelines-checker

Author: kristapratico

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

@@ -0,0 +1,35 @@
+name: Copilot Setup Steps
+
+on: workflow_dispatch
+
+env:
+  COPILOT_AGENT_FIREWALL_ALLOW_LIST: https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-for-python/pypi/simple/
+
+jobs:
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+          cache: 'pip'
+      
+      - name: Create and activate virtual environment
+        run: |
+          python -m venv .venv
+          source .venv/bin/activate
+          echo "VIRTUAL_ENV=$(pwd)/.venv" >> $GITHUB_ENV
+          echo "$(pwd)/.venv/bin" >> $GITHUB_PATH
+      
+      - name: Install Dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r eng/ci_tools.txt