Add runner verification workflow

.gitea/workflows/verify.yaml

@@ -0,0 +1,18 @@
+name: Verify Mac Runner
+on: [push, workflow_dispatch]
+jobs:
+  verify-runner:
+    runs-on: self-hosted
+    steps:
+      - name: Check OS
+        run: |
+          echo "Running on $(uname -a)"
+          sw_vers || true
+      
+      - name: Check Docker/Podman
+        run: |
+          docker --version
+          docker info
+      
+      - name: Hello World
+        run: echo "Runner is operational!"