Support for HoloLens 2 Reading Mode

Describe the problem

Reading Mode as implemented in MRTK v2 is incompatible with URP. This would be a great fit for an MRGT feature, as it is a low level (and possibly "accessibility"-related feature) tied to render features and overall graphical quality of the MR app.

Describe the solution you'd like

Some sort of opt-in URP render feature thingy that enables Reading Mode!

Describe alternatives you've considered

Not using URP :(

Additional context

MRTK issues: https://github.com/microsoft/MixedRealityToolkit-Unity/issues/10337, https://github.com/microsoft/MixedRealityToolkit-Unity/issues/8344, https://github.com/microsoft/MixedRealityToolkit-Unity/pull/8651, https://github.com/microsoft/MixedRealityToolkit-Unity/pull/8808

Reading mode info: https://docs.microsoft.com/en-us/hololens/hololens2-display#what-improvements-are-coming-that-will-improve-hololens-2-image-quality

Commencez par examiner les issues et pull requests MRTK associés, puis lisez les informations associées sur HoloLens 2 Reading Mode et inspectez les composants graphiques Unity du dépôt. La tâche est considérée comme terminée lorsqu'une render feature Unity URP activable en option prend en charge HoloLens 2 Reading Mode et que le comportement attendu en matière de qualité d'image est documenté ou testé.