Adding string array and 3d array support

[germa89]

String arrays

Now you can retrieve them if you know the name.

String arrays cannot be listed in MAPDL hence the user needs to track when an string array is created, because they won't appear in mapdl.parameters.

If they have more than one dimension, they are appended linearly. Hence an string array more than 2D is not recommended because the order might not be maintaned.

3D arrays

You can retrieve them using mapdl.parameters['arrayname'].
You can set them using normal MAPDL commands:

mapdl.dim("myarr", "array", 2, 2, 2)
mapdl.run("myarr(1,1,1)= 100")
mapdl.run("myarr(1,1,2)= 200")
mapdl.run("myarr(1,2,2)= 300")
mapdl.run("myarr(2,1,2)= 400")

Eventually, one day, I will figure out how a way to write them. But I believe the mapping between numpy arrays and MADPL arrays is not going to be trivial.

[codecov]

Codecov Report

Merging #1729 (646139c) into main (5e57a31) will increase coverage by 0.11%.
The diff coverage is 92.30%.

@@            Coverage Diff             @@
##             main    #1729      +/-   ##
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+ Coverage   85.26%   85.38%   +0.11%     
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  Files          45       45              
  Lines        7506     7567      +61     
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+ Hits         6400     6461      +61     
  Misses       1106     1106