Brush size slider not working2907

[Tomas1337]

This branch attempts to add a brushtool.

So far this is the last prompt:

im in the middle of implementing the brush-size feature for the highlight tool in the GenerateHighlightMesh, the meshes seem to be stored in sets of meshes? This is not ideal because when we use the erase tool, groups of meshes are being deleted, when we only really wanted to erase separate faces. it seems like the erase tool is deleting that entire group mesh which was all highlighted at the same time too. We want to be able to erase individual faces and not groups of meshes. so i think best to modify the code in a way where we make the this.highlightMeshes = HighlightTool.sharedHighlightMeshes; more granular by giving it faces instead of meshes?

We want to also be able to keep the feature of highlighitng the adjaces faces based on the brush size as currently implemented

Keep the changes minimial and as much as possible isolated to GenerateHighlightMesh and maybe if truly needed the ApplyHighlight and RemoveHighlight as well