Adds Copilot setup workflow

Creates a workflow to setup the environment for Copilot-related tasks.

This includes checking out the code and setting up the .NET 9 SDK, ensuring a consistent and reproducible environment for development and testing.

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

@@ -0,0 +1,19 @@
+name: "Copilot Setup Steps"
+
+on: workflow_dispatch
+
+jobs:
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up .NET 9 SDK
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: "9.0.x"