Support for Seeeduino XIAO BLE board

I’ve added support and created a pull request into the main PlatformIO repo.

Can you remove your

  • C:\Users\heikk\.platformio\packages\framework-arduino-mbed
  • C:\Users\heikk\.platformio\platforms\nordicnrf52

folders and use the platformio.ini in Add Xiao nRF52840 (Sense) board support by maxgerhardt · Pull Request #151 · platformio/platform-nordicnrf52 · GitHub?

Note that Git should be installed for this to work.