Expand/Improve upon our general-purpose vertex processing

[PanosK92]

In the forest world, the vegetation animates to emulate wind, you can step on it and bend it, you can even go into the water and create ripples, all of this is done via this: https://github.com/PanosK92/SpartanEngine/blob/master/data/shaders/common_vertex_processing.hlsl

This can always be expanded and/or improved, you can get inspiration from what Naughty Dog is doing: https://youtu.be/LjCjXFmkX-4?t=43

General-purpose vertex processing is often overlooked but it can help elevate a world.