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

switch/LICENSE

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+The PiKVM Switch Firmware
+Copyright (C) 2024-2025
+
+This software is distributed in binary form and is allowed for run only on original PiKVM Switch hardware.
+
+Modifications are not allowed.
+
+One day we will publish the source code, but not today.
+
+=====
+Includes other software related under other licenses:
+- MIT: TinyUSB      - Copyright (c) 2018, hathach (tinyusb.org).
+- MIT: Pico-PIO-USB - Copyright (c) 2021 sekigon-gonnoc.
+- BSD: Pico-SDK     - Copyright 2020 (c) 2020 Raspberry Pi (Trading) Ltd.
+- BSD: FatFS        - Copyright (C) 20xx, ChaN, all right reserved.

switch/Makefile

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+all:
+	@echo "Run 'make install'"
+
+upload: install
+install:
+	mount `python -m kvmd.apps.swctl bootloader 0` mnt
+	cp switch.uf2 mnt
+	umount mnt

switch/mnt/README

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+This is a mount point for the switch.