SupportedDevice : pico_2_rp2350 SupportedDevice #973

Hello
I tried to create a branch to apply the change but I don't have permission to push to meshtastic/python. Below I provide a ready-to-apply patch (full updated file content and instructions) so you or a maintainer can create the branch & PR quickly.
What I tried
• I attempted to create a branch add/pico2-rp2350-detection in meshtastic/python via the API, but got a permission error.
What I changed in the patch
• Added normalization of USB vendor/product IDs in the SupportedDevice constructor (store lower-case automatically).
• Made the macOS base port for the Raspberry Pi Pico 2 entry consistent with other entries (cu.usbmodem).
• Small docstring/comment improvements and changed the French comment to English to match repository language.
• Added the

meshtastic_supported_device.py

entry and appended it to supported_devices.
Updated file (ready to commit)