* Add 9Router panel plugin
This commit introduces the initial version of the 9Router panel plugin.
It provides a Noctalia panel to manage 9Router model combos directly
from the bar, without requiring the web dashboard.
Key features:
- List, create, rename, and delete model combos.
- Reorder models within a combo via drag-and-drop.
- Change combo routing kind (fallback, round-robin, fusion).
- Search and filter combos.
- Supports 9Router dashboard authentication via CLI token or password.
Includes a bar widget showing connection status, a full UI panel,
and a background service to interact with the 9Router REST API.
Translations for English and Vietnamese are included.
* Rename 9Router Panel to 9Router Control
Update plugin IDs, IPC commands, and internal references.
* Quote shell args in service commands
Add shell_quote() for URLs, bodies, and file paths passed to
noctalia.runAsync. Declare required external commands in plugin.toml
and document them in the README.
