add Waveshare RP2040 zero board support #183
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Increased _desc_str size from 32 to 64 to allow longer USB string descriptors. Replaced the fixed limit (31) with a value derived from the buffer size for clarity and maintainability.
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Summary
This PR adds support for the Waveshare RP2040 Zero board and WS2812 LEDs.
Changes
Motivation
The Waveshare RP2040 Zero is a compact and affordable board that is widely used.
Adding WS2812 support enables built-in RGB LED functionality, useful for status indication.
The USB descriptor change improves maintainability when handling longer strings.
Testing
cmakeandmake