Add a few more tests

[paulromano]

This PR adds a few more tests:

• TRCL on a cell whose definition includes a macrobody
• VOL keyword on a cell
• Invalid plane when using P surface
• BOX macrobody with 9 parameters (infinite in one direction)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.69%. Comparing base (3a69e84) to head (328d403).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   84.66%   85.69%   +1.02%     
==========================================
  Files           3        3              
  Lines         724      720       -4     
  Branches      190      186       -4     
==========================================
+ Hits          613      617       +4     
+ Misses         57       55       -2     
+ Partials       54       48       -6     

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