New nodes: Mirror, Round Corners, Box Warp, Remove/Generate Handles, Spatial Merge by Distance (#2448)

* Add Mirror and Round Corner nodes

* Removed perspective warp ride along node

* Fixed naming, added back Box Warp

* Add Soften, Sharpen and Subdivide

* Code review

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

Author: otdavies