[FTheoryTools] Add Morrison–Park model and KBar parameter

[apturner]

Adds the Morrison–Park model as a simpler example of a literature hypersurface model, and adds a parameter "KBar" to all literature models that don't already have a parameter in the class [KBar].

[codecov]

Codecov Report

Merging #2567 (ba2e7d0) into master (9ae5233) will decrease coverage by 0.01%.
The diff coverage is n/a.

❗ Current head ba2e7d0 differs from pull request most recent head ecef0c9. Consider uploading reports for the commit ecef0c9 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2567      +/-   ##
==========================================
- Coverage   71.68%   71.67%   -0.01%     
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  Files         416      416              
  Lines       56622    56586      -36     
==========================================
- Hits        40591    40560      -31     
+ Misses      16031    16026       -5     

see 6 files with indirect coverage changes

[HereAround]

Thank you very much indeed @apturner.