feat: add configuration templates

- docker-compose-gitea.yml.tpl: Gitea + SQLite container
- app.ini.tpl: Gitea config (INSTALL_LOCK, Actions enabled, no registration)
- docker-compose-runner.yml.tpl: act_runner Docker container (Linux)
- runner-config.yaml.tpl: act_runner config (capacity=1, timeout=3h)
- com.gitea.runner.plist.tpl: macOS launchd service for native runner
- nginx-gitea.conf.tpl: Nginx reverse proxy with SSL/WebSocket support
- workflows/security-scan.yml.tpl: Semgrep + Trivy + Gitleaks workflow

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

templates/docker-compose-gitea.yml.tpl

@@ -0,0 +1,18 @@
+version: "3"
+
+services:
+  gitea:
+    image: gitea/gitea:${GITEA_VERSION}
+    container_name: gitea
+    restart: unless-stopped
+    environment:
+      - USER_UID=1000
+      - USER_GID=1000
+    volumes:
+      - ${DATA_PATH}/data:/data
+      - ${DATA_PATH}/config:/data/gitea/conf
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+    ports:
+      - "${GITEA_PORT}:3000"
+      - "${GITEA_SSH_PORT}:22"