Add a minimal VNC viewer application that connects to a VNC server
and renders the remote desktop on a local LCD.
Features:
- RFB 3.8 protocol with VNC Authentication (DES, pure software)
- Raw encoding with pixel format auto-detected from LCD driver
- Row-by-row rendering via LCDDEVIO_PUTAREA (minimal RAM usage)
- LCD resolution and format queried at runtime via LCDDEVIO_GETVIDEOINFO
- Auto-reconnect on connection loss with 2-second retry
Usage:
vncviewer <host> [port]
vncviewer -p <password> <host> [port]
vncviewer -p <password> -d <lcd_devno> <host> [port]
Assisted-by: GitHubCopilot:claude-4.6-opus
Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
