feat: add act configuration for local workflow testing

- Add .actrc file to map custom runner labels to Docker images
- Add test-workflow.sh script for easy local testing with act
- Maps php-ci runner to php-ci:latest Docker image
- Maps docker-build runner to docker:latest
- Helps resolve 'ansible: command not found' errors when testing workflows locally

test-workflow.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+# Script to test Gitea workflows locally with act
+# Maps custom runner labels to Docker images
+
+act -P php-ci=php-ci:latest \
+    -P docker-build=docker:latest \
+    -P ubuntu-latest=ubuntu:latest \
+    -P ubuntu-22.04=ubuntu:22.04 \
+    "$@"