Feature/wiring

[khlam]

Overview

This PR consolidates all MicroPython I²C driver packages (i2c_bus, atgm336h, mpu6050, qmc5883p, vl53l0x, vl53l5cx) by removing chip-specific backend files (esp32s3.py, rp2040.py, rp2350.py) and unifying them under a single __init__.py per package. All dependent projects (compass, distance-stream, gps, gyro-stream, multizone-ranging) are updated to use the new unified driver API, with tests refactored accordingly.

What's New

• Comprehensive chip-specific file removal across 6 firmware packages, consolidating ESP32-S3, RP2040, and RP2350 implementations into unified __init__.py modules.
• New micropython_stubs/machine.py stubs expanded (+51 lines) to support host-side testing of the refactored drivers.
• New test coverage for multizone-ranging project (test_full_import.py, test_init_sensor.py).
• Updated README files for atgm336h, i2c_bus, distance-stream, gps, gyro-stream, and multizone-ranging packages/projects.

What Has Changed

• i2c_bus: Chip-specific backends removed (esp32s3.py, rp2040.py, rp2350.py); __init__.py unified (+76/- lines); tests simplified with shared conftest.
• atgm336h (GPS): Chip-specific files removed; driver logic consolidated in __init__.py; test suite refactored with fake_uart removal.
• mpu6050 (IMU): Driver unified under __init__.py (+39 lines); tests updated for new API.
• qmc5883p (Magnetometer): Driver unified under __init__.py; tests updated.
• vl53l0x (ToF): Driver unified under __init__.py (+41 lines); tests updated.
• vl53l5cx (ToF): Driver unified under __init__.py (+39 lines); new conftest and test additions.
• manifest.py: Updated to reflect package structure changes.
• Projects (compass, distance-stream, gps, gyro-stream, multizone-ranging): Firmware main.py updated to use consolidated driver APIs; tests refactored with simplified conftest fixtures; READMEs updated.
• cpython-packages/micropython_stubs: machine.py stubs expanded to support host-side testing of refactored drivers.

What's Fixed

• Eliminated code duplication across chip-specific driver implementations (6 packages × 3 chips = ~18 files consolidated).
• Simplified test fixtures by removing redundant chip-dispatch logic in conftest files.
• Removed unused fake_uart.py from atgm336h tests, reducing test maintenance burden.

Testing

• All firmware package tests updated: i2c_bus, atgm336h, mpu6050, qmc5883p, vl53l0x, vl53l5cx.
• All project tests updated: compass, distance-stream, gps, gyro-stream, multizone-ranging (new).
• Run with: docker compose up pytest --build --exit-code-from pytest (all) or target specific paths.

Additional Information

• 55 files changed: +1,071 / -878 lines — net reduction of ~200 lines despite new test coverage.
• The refactoring follows the existing backend-dispatch pattern established by boot_status_led.
• No functional behavior changes to drivers — only structural consolidation.