FEAT: Import nastran improvements

[maxcapodi78]

Added Support for CHEXA, PSHELL and MPC in import_nastran method
Pshell are used for Material assignment
MPC for Port assignment
The method is now also returning the dictionary of the objects so user can manipulate and grab information useful to setup and material assignment

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[codecov]

Codecov Report

Attention: Patch coverage is 96.07843% with 2 lines in your changes missing coverage. Please review.

Project coverage is 84.40%. Comparing base (72dd3bd) to head (9cf2a40).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5364   +/-   ##
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  Coverage   84.39%   84.40%           
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  Files         140      140           
  Lines       58503    58549   +46     
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+ Hits        49375    49419   +44     
- Misses       9128     9130    +2     

[SMoraisAnsys]

Thanks for the changes, I like the idea of returning the dictionary. I left minor comments.
Btw, could you improve the code coverage of the PR ?