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/systemd.yml

@@ -0,0 +1,17 @@
+---
+- name: deploy act_runner systemd service
+  become: true
+  ansible.builtin.template:
+    src: act_runner.service.j2
+    dest: /etc/systemd/system/act_runner.service
+    mode: "0644"
+  notify: restart act_runner
+  tags: gitea-actions
+
+- name: enable act_runner service
+  become: true
+  ansible.builtin.systemd:
+    name: act_runner
+    daemon_reload: true
+    enabled: true
+  tags: gitea-actions