Create Overview Documentation for Fingertip Visualization

[AMollis]

This issue has been migrated a new MRTK repository, and the status of this issue will now be tracked at the following location:

• Create Overview Documentation for Fingertip Visualization MixedRealityToolkit/MixedRealityToolkit-Unity#157

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Overview

The MRTK2 provided an overview document for the Fingertip Visualizations, https://learn.microsoft.com/en-us/windows/mixed-reality/mrtk-unity/mrtk2/features/ux-building-blocks/fingertip-visualization?view=mrtkunity-2022-05. Something similar might be useful for MRTK3

Additional Infomration

There is some documentation on MRTK3's fingertip visualization

• https://learn.microsoft.com/en-us/windows/mixed-reality/mrtk-unity/mrtk3-overview/architecture/interactors#ipokeinteractor
• https://learn.microsoft.com/en-us/dotnet/api/microsoft.mixedreality.toolkit.input.pokeinteractor?view=mrtkinput-3.0
• MRTKPokeReticleVisual is missing API reference documenation