start of support for model train set

[Veracity0]

adds the unbound & bound IOTMs
adds to campground items and workshed items.

[codecov]

Codecov Report

Merging #1333 (257832f) into main (1f76a78) will increase coverage by 0.00%.
The diff coverage is 66.66%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1333   +/-   ##
=========================================
  Coverage     33.17%   33.17%           
- Complexity    16589    16591    +2     
=========================================
  Files          1045     1045           
  Lines        162857   162859    +2     
  Branches      35352    35352           
=========================================
+ Hits          54024    54027    +3     
+ Misses        99379    99377    -2     
- Partials       9454     9455    +1     

Impacted Files	Coverage Δ
.../net/sourceforge/kolmafia/objectpool/ItemPool.java	14.28% <ø> (ø)
...et/sourceforge/kolmafia/session/ChoiceControl.java	8.79% <0.00%> (-0.01%)	⬇️
...ourceforge/kolmafia/request/CampgroundRequest.java	35.01% <100.00%> (+0.07%)	⬆️
...rceforge/kolmafia/persistence/HolidayDatabase.java	62.79% <0.00%> (+0.51%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1f76a78...257832f. Read the comment docs.

[midgleyc]

Thanks!