Add SeedStudio XiaoMG24

[Nerivec]

Fixes #22

[Nerivec]

@alinelena This is purely from details taken from https://github.com/SiliconLabs/arduino I don't have the board, so this entirely untested. Be sure to know how to restore back to whatever you had before in case this does not work.

Artifacts at the bottom contain the GBL files:
https://github.com/Nerivec/silabs-firmware-builder/actions/runs/12553648109

For the router build, obviously Z2M does not support it. I figure you'll know your way around adding an external converter for it (can just copy & adapt the logic from zhc), the fingerprint should be:

{modelID: 'XiaoMG24', manufacturerName: 'SeeedStudio', applicationVersion: 200},

Note: you will need Zigbee2MQTT 2.0.0 for this (current dev branch/edge add-on)

Let me know how it goes.