[request] Support for PlatformIO IDE

[LorbusChris]

Summary

I'd love to be able to use this Arduino core with PlatformIO.

I've done some initial work to create a PlatformIO framework builder here: platformio/platform-siliconlabsefm32#8

Please feel free to re-use that, I'll likely not get around to finishing it myself.

[silabs-bozont]

Hello @LorbusChris,
PlatformIO support is on our list of plans, so it'll be coming in the future!

[balthz]

Do you have any update on this? I'm also interested in PlatformIO support for the Arduino Matter and excited to hear this is on you folks' list of plans!