git proxy: add start/stop/restart daemon lifecycle for FastGitHub.

Background daemons with port/PID tracking and Parallels socat, keep FastGithub logs off the TTY, and document install in the skill.

README.md

@@ -62,7 +62,7 @@ mytoolkit --help
 | `templates` | Inspect template root; external override still possible |
 | `env` | Manage stored vars (api keys, paths, feishu app credentials) |
 | `ssh` | `list` / `connect` / `tunnel` / `cmd` |
-| `git` | `proxy` (set/unset/list/status) |
+| `git` | `proxy` (start/stop/restart/status/set/unset/list/run) |
 | `server` | Manage dev/serve servers |
 | `update` | Reinstall from local repo |
 | `uninstall` | Uninstall |