CubeGizmo - add curved arrow controls and light blue color on controls when moused over (#16)

* Gizmo replaced with CubeGizmo (custom copy of Gizmo)

* update axis colors, reduce font size, add font color, remove circle, remove opacity change

* add gray cube, position x y z axis and text

* CubeGizmo - fix axis label text getting cut off in certain positions

* CubeGizmo - hide axis text when axis is orthogonal to view

* CubeGizmo add Front, Right etc text, and orient

* CubeGizmo - orient camera when faces are clicked

* CubeGizmo - add triangle controls, and rotate when triangle controls are clicked

* CubeGizmo - fix triangle up down, accidentally deleted line

* CubeGizmo - remove unused code from original Gizmo

* run formatter, rename *.d.ts files to *.ts remove unused CubeGizmoEvents and CubeGizmoSlots from .ts file

* CubeGizmo - add light blue hover color to triangles

* CubeGizmo - add lightBlue color when mouse hovers over cube face

* CubeGizmo - add curved arrows, and rotate model when clicked

* CubeGizmo - add light blue color on curved arrow click, refactor of curvedArrowDwg intersection calculation

* CubeGizmo - minor cleanup / refactor

* run formatting

Author: soshochang