feat: update Hermes Dockerfile to build from forked source

- Switch Dockerfile to clone from gortium/hermes-agent (Gitea fork)
- Add SSH agent forwarding for private repo clone at build time
- Set CHROME_EXECUTABLE for Playwright Chromium
- Remove patch_tts_tool.py (Piper patch now in fork source)
- Enable Gitea Actions in versioncontrol compose

ai/compose.yml

@@ -26,7 +26,10 @@ services:
   #     - "traefik.http.routers.webui-https.tls.certresolver=njalla"
 
   hermes:
-    build: ./hermes
+    build:
+      context: ./hermes
+      ssh:
+        - default
     container_name: hermes
     restart: always
     # Gateway run enables the internal API server on port 8642