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/sysusers.conf

@@ -1,4 +1,5 @@
 g kvmd - -
+g kvmd-media - -
 g kvmd-pst - -
 g kvmd-ipmi - -
 g kvmd-vnc - -
@@ -7,6 +8,7 @@ g kvmd-janus - -
 g kvmd-certbot - -
 
 u kvmd - "PiKVM - The main daemon" -
+u kvmd-media - "PiKVM - The media proxy"
 u kvmd-pst - "PiKVM - Persistent storage" -
 u kvmd-ipmi - "PiKVM - IPMI to KVMD proxy" -
 u kvmd-vnc - "PiKVM - VNC to KVMD/Streamer proxy" -
@@ -19,8 +21,11 @@ m kvmd gpio
 m kvmd uucp
 m kvmd spi
 m kvmd systemd-journal
+m kvmd kvmd-media
 m kvmd kvmd-pst
 
+m kvmd-media kvmd
+
 m kvmd-pst kvmd
 
 m kvmd-ipmi kvmd
@@ -32,6 +37,7 @@ m kvmd-janus kvmd
 m kvmd-janus audio
 
 m kvmd-nginx kvmd
+m kvmd-nginx kvmd-media
 m kvmd-nginx kvmd-janus
 m kvmd-nginx kvmd-certbot