Add a sample that uses AR image tracking

[truedat101]

See nice post from Alessio : https://www.linkedin.com/posts/alessio-grancini_spectacles-activity-7311530098942251008-1JTj?utm_source=share&utm_medium=member_desktop&rcm=ACoAAAAIENgBAB7U7RX_Hl-tsAvNwMh3WO-qm4E

[truedat101]

I've got a decent little sample here: https://github.com/IoTone/SnapSpectaclesIKSamples/tree/main/MarkerTracking

It needs to be expanded to be interesting, and some set up instructions.