feat: add gitea-actions role for Gitea act-runner

- Create gitea-runner user with podman access
- Install podman-docker for docker CLI compatibility
- Download and configure act_runner binary
- Systemd service for act_runner daemon
- Host-mode runner labels for Fedora

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ansible/roles/gitea-actions/tasks/main.yml

@@ -0,0 +1,9 @@
+---
+- import_tasks: user.yml
+  tags: gitea-actions
+- import_tasks: deps.yml
+  tags: gitea-actions
+- import_tasks: runner.yml
+  tags: gitea-actions
+- import_tasks: systemd.yml
+  tags: gitea-actions