gyro: calibration tune and drift tester fixes (#97)

docs: EthOS config adjusted

test: drift tester (xiao + pca9685 + servo) and gyro calibration tune (#96)

para: set axis-to-channel mapping (#94)

para: remotely set device name (#93)

para: avoid endless loop on set system attributes error (#91)

para: remote factory reset and reboot (#88)

flash: new data structure + save state on runtime (#87)

para: run in a separate thread + refactor (#86)

fix: nameless calibration offsets (#85)

fix: ensure timing (#84)

Build against latest TinyGo release and dev branch (#83)

feat: Reset orientation via Bluetooth link (Write 'R' to 0xAFF2) (#80)

para: Change name from "Hello" to "HT <Version>" (#79)

fix: build, linking softdevice (#78)