Bgl replacement (and other 3.5 / 4.0 curiosities)

[zeffii]

alternative bgl abstraction.

continuation of https://github.com/nortikin/sverchok/pull/4936

• [x] remove bgl from current node set and modules/utils
• [x] adjust blf.text to handle 3 vs 2 parameters
• [ ] implement texture/image loading for texture/buffer using nodes (texture viewers and console node)
  • https://docs.blender.org/api/4.0/gpu.types.html
  • affected nodes ( TextViewer, TVLite, Stethoscope ( nice mode ), Console Node ) , These are not the most essential nodes but
    • "nice mode" for stethoscope is pretty cool and if I get that to work then console node will also work automatically (they share the same code)
    • Texture Viewer nodes use some Gl code to place the texture in a state to receive data which i'm only tangentially familiar with :)
• [x] bug fix front_facing polygon drawing thru
  • lines are not being obscured by polygons.
• [x] polygon offset alternative
  • [x] avoid z-fighting ( proof of concept: at the moment implements a normal shader in custom-shader mode )
  • [ ] reimplement custom shader
  • [ ] implement shader for flat/facet/smooth

Node	works in < 4.0	works in > 4.0	feature parity	issue
Viewer Draw	yes	yes	no	zfighting lines
Stethoscope MK2	yes	yes	no	advanced drawing to buffer not implemented, no colour highlighting
Matrix View	yes	yes	maybe	plane seems to always draw
Viewer Index	yes	yes	yes	...
Viewer 2D	yes	yes	yes	...
Viewer Draw Curve	yes	yes	yes	...
Viewer Draw Surface	yes	yes	yes	...
Texture Viewer	yes	?	?	?
Texture Viewer Lite	yes	?	?	?
SvWaveformViewer	yes	yes	yes	...
Console Node	yes	?	?	?
Solid Viewer (did not test)	yes	?	?	?
Easing 0..1	yes	yes	yes	...