Fixing area coloring

[germa89]

As the title.

Now you can do something like:

from ansys.mapdl.core import launch_mapdl
import numpy as np

mapdl = launch_mapdl()
mapdl.clear()
mapdl.prep7()
mapdl.block(0,1,0,1,0,1)

for each in [
    True, 
   "red",
   ["red", "green", "blue", "yellow", "white", "purple"],
   [[255,255,255], [255,255,0], [255,0,0], [0,255,0], [0,255,255],[0,0,0]],
   255*np.array([[1,1,1], [1,1,0], [1,0,0], [0,1,0], [0,1,1],[0,0,0]]),
   ]:
    color_areas = each 
    mapdl.aplot(vtk=True, color_areas = color_areas)

Close #2011

[codecov]

Codecov Report

Merging #2195 (bb63332) into main (55e0e2e) will increase coverage by 0.95%.
Report is 61 commits behind head on main.
The diff coverage is 94.63%.

@@            Coverage Diff             @@
##             main    #2195      +/-   ##
==========================================
+ Coverage   86.43%   87.39%   +0.95%     
==========================================
  Files          45       45              
  Lines        7971     8224     +253     
==========================================
+ Hits         6890     7187     +297     
+ Misses       1081     1037      -44     

[germa89]

I have tested locally again and the behaviour is as expected. I will open an issue on PyVista.