Print options for CGL v2

[SJuliez]

A few requests (as chatted on Discord).

• The ability to export to a folder structure (Our structure is perfect)
• The ability to print multiunits on a sheet for Infantry, proto's and BA (5 a sheet)
• The ability to run a specific unit type (in addition to the mass group) i.e. print Mechs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.52%. Comparing base (45d894e) to head (12cb858).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##             master   #1548      +/-   ##
===========================================
- Coverage      0.52%   0.52%   -0.01%     
  Complexity       49      49              
===========================================
  Files           264     265       +1     
  Lines         30349   30389      +40     
  Branches       5172    5182      +10     
===========================================
  Hits            160     160              
- Misses        30148   30188      +40     
  Partials         41      41              

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[HammerGS]

Not entering this into History.