Add support for PiKVM Switch and related features

This commit introduces several new components and improvements:
- Added Switch module with firmware update and configuration support
- Implemented new media streaming capabilities
- Updated various UI elements and CSS styles
- Enhanced keyboard and mouse event handling
- Added new validators and configuration options
- Updated Python version support to 3.13
- Improved error handling and logging

configs/os/services/kvmd-media.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=PiKVM - Media proxy server
+After=kvmd.service
+
+[Service]
+User=kvmd-media
+Group=kvmd-media
+Type=simple
+Restart=always
+RestartSec=3
+
+ExecStart=/usr/bin/kvmd-media --run
+TimeoutStopSec=3
+
+[Install]
+WantedBy=multi-user.target