Add ffmpeg to live CD package list

- Include ffmpeg binary for multimedia processing
- Required for MBetterClient multimedia functionality
- Available in both live CD and installed system
- Fixes PyInstaller build issues related to ffmpeg dependencies

config/package-lists/live.list.chroot

@@ -92,6 +92,9 @@ iw
 wpasupplicant
 dhcpcd5
 
+# Multimedia tools
+ffmpeg
+
 # Hardware detection and management
 pciutils
 usbutils