Blender Git Loki

- some more cleanup

Merge remote-tracking branch 'origin/gsoc-2021-porting-modifiers-to-nodes-solidify' into gsoc-2021-porting-modifiers-to-nodes-solidify

# Conflicts:
# source/blender/nodes/CMakeLists.txt
# source/blender/nodes/geometry/nodes/node_geo_solidifiy.cc

- re-added the one important file that I deleted by accident.

- deleted unneeded files

rebaseing and cleanup

- selection for simple

makeing node and modifier working with solidify kernel version.

moved solidify to Blender Kernel

- working with data from node

solidify_extrude_generaly working.

- rebased to master
- removed solidify extrude mode from node and reverted solidify extrude
back to internal version in modifier
- fixed vertex-groups for

- added output groups for rim and fill

Initial setup for solidify node

solidify_extrude_generaly working.

- working with data from node

- added basic support for input data

moved solidify to Blender Kernel

makeing node and modifier working with solidify kernel version.

- added offset and boundary data enums for nonmanifold mode.

- selection for simple

make selection work for complex mode

rebaseing and cleanup

Differential Revision: https://developer.blender.org/D11575

- selection for simple

makeing node and modifier working with solidify kernel version.

moved solidify to Blender Kernel

Initial setup for solidify node

- working with data from node

solidify_extrude_generaly working.

- added basic support for input data