feat: supporting ´´to_dataframe()´´ for some bc list commands

[pvargasm]

Description

to_dataframe() support for the output of following list boundary conditions commands: DKLIST, DLLIST, DALIST, FKLIST, SFLLIST, BFKLIST, BFLLIST and BFALIST

Issue linked

N / A

Checklist

• I have visited and read Develop PyMAPDL.
• I have tested my changes locally
• I have added necessary documentation or updated existing documentation.
• I have followed the PyMAPDL coding style guidelines.
• I have added appropriate unit tests that also ensure the minimal coverage criteria.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have marked this PR as draft if it is not ready to be reviewed yet.
• I have made sure that the title of my PR follows Commit naming conventions (e.g. feat: adding new MAPDL command)

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[codecov]

Codecov Report

Attention: Patch coverage is 82.97872% with 8 lines in your changes missing coverage. Please review.

Project coverage is 83.36%. Comparing base (1b82d34) to head (54d9fd1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3412      +/-   ##
==========================================
- Coverage   85.13%   83.36%   -1.78%     
==========================================
  Files          55       55              
  Lines        9925     9963      +38     
==========================================
- Hits         8450     8306     -144     
- Misses       1475     1657     +182     

[clatapie]

It looks good to me! However it seems that the coverage percentage is not high enough to pass. Ideally, you should add additional unit tests to check all the possible cases.
Pinging @germa89 for visibility.