feat: Add Arduino UNO compatibility layer (split-brain architecture)

[RoboX2020]

• Implemented a split-brain architecture to support Arduino UNO (ATmega328P) which lacks the memory/CPU to run the full ESP-Claw stack.

• Created arduino_claw_uno firmware acting as a peripheral controller executing JSON commands over Serial.

• Supported features: GPIO (read/write/mode), Analog (ADC/PWM), Servo (max 4), I2C (read/write/scan).

• Added bridge.py as a host-side Python bridge that exposes the Arduino hardware via an interactive CLI and API.

• Included ai_shell.py, a natural language programmer supporting both OpenAI and Anthropic, enabling Chat Coding on Arduino.

• Created comprehensive documentation and README in the arduino/ directory.

Description

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Testing

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[RoboX2020]

ADDED ARDUINO COMPATIBILITY LAYER

[CLAassistant]

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✅ RoboX2020
❌ PRAJVAL ARORA

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