Fix buffer protocol TypeError in I2C write operations for current MicroPython

[Copilot]

Current MicroPython versions on ESP32 require i2c.writeto_mem() to receive bytes-like objects, not raw integers. The library was passing integers directly, causing TypeError: object with buffer protocol required.

Changes

• lib/lidar.py: Wrap integer values in bytes([value]) before passing to writeto_mem()
• .gitignore: Added to exclude Python bytecode cache

Technical Details

All _write() calls pass single-byte integer values (0x01, 0x02, register values, etc). Converting via bytes([value]) creates the required single-byte buffer:

def _write(self, addr, value):
-   self.i2c.writeto_mem(self.addr, addr, value)
+   self.i2c.writeto_mem(self.addr, addr, bytes([value]))

This maintains compatibility while satisfying the buffer protocol requirement in newer MicroPython releases.

Original prompt

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This section details on the original issue you should resolve

<issue_title>library does throws exception with current micropyhton on esp32</issue_title>
<issue_description>library throws
TypeError: object with buffer protocol required
in current micropython version.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes library does throws exception with current micropyhton on esp32 #1

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