feat: add copilot-setup-steps.yml to pre-install uv and Python dependencies

Agent-Logs-Url: https://github.com/jbcoe/cc-protocol/sessions/22b17330-4936-4def-954a-0659f1a3e8ab

Co-authored-by: jbcoe <777363+jbcoe@users.noreply.github.com>

Author: Copilot

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

@@ -0,0 +1,30 @@
+name: "Copilot Setup Steps"
+
+# Automatically run the setup steps when they are changed to allow for easy validation, and
+# allow manual testing through the repository's "Actions" tab
+on:
+    workflow_dispatch:
+    push:
+        paths:
+            - .github/workflows/copilot-setup-steps.yml
+    pull_request:
+        paths:
+            - .github/workflows/copilot-setup-steps.yml
+
+jobs:
+    # The job MUST be called `copilot-setup-steps` or it will not be picked up by Copilot.
+    copilot-setup-steps:
+        runs-on: ubuntu-latest
+
+        permissions:
+            contents: read
+
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v4
+
+            - name: Install uv
+              uses: astral-sh/setup-uv@v5
+
+            - name: Install Python dependencies
+              run: uv sync