EWS Rev 0.1 - Complete design with documentation

Release Features:
- Universal HAT for Raspberry Pi 4/5 and Radxa Rock 5B/5B+
- 8A DC/DC converter with SS56 reverse polarity protection
- Dual toolhead switching via PFETs (PB2/PA5 control)
- Native CAN and USB-CAN bridge support
- USB hub with power delivery for touchscreens
- Comprehensive safety features and thermal management

Hardware:
- STM32G0B1KBU6 MCU with crystal-less design
- MaxLinear XR76208 switching regulator
- MCP2542WFD CAN transceiver with jumper selection
- WCH CH334F USB hub with MTT support
- 2oz copper PCB recommended for thermal performance

Documentation:
- Bilingual documentation (German/English)
- Installation guides with kernel diagnostics
- Klipper configuration examples
- Comprehensive problem statement and solutions

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