This adds constrained angle mode improvements,
snapping to global and local orientation,
visible distance and angle measurements,
undo capability,
x-ray mode,
multi-object edit mode.
See https://developer.blender.org/D12600 for more details.
Note: this project moved some of the default keymappings
around a bit, as discussed with users in the thread
https://devtalk.blender.org/t/gsoc-2021-knife-tool-improvements-feedback/19047
We'll change the manual documentation in the next couple of days.
6e77afe6ec