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/defaults/main.yml

@@ -0,0 +1,11 @@
+---
+gitea_runner_user: gitea-runner
+gitea_runner_home: /home/gitea-runner
+gitea_runner_version: "0.2.13"
+gitea_runner_arch: linux-amd64
+gitea_instance_url: https://git.debyl.io
+
+# Paths
+act_runner_bin: /usr/local/bin/act_runner
+act_runner_config_dir: /etc/act_runner
+act_runner_work_dir: /var/lib/act_runner