RealRyte Admin Menu v4.0.0

- Adds an ONLINE sidebar panel inside the in-game admin menu.
- ONLINE lists current players with ID, ping, health, armor and coordinates.
- WATCH LIVE / STOP WATCH controls the same server-side watch targets used by the RealRyte web panel.
- Live Watch frames are captured by screenshot-basic on the target player and posted through realryte_admin to the web panel.
- Added frame normalization for screenshot-basic builds returning raw base64.
- Web panel watch endpoint now accepts larger JSON frames; the old generic 1 MiB parser could leave valid feeds stuck on CONNECTING.
