* Unit can now only be purchased if no other unit of same type is stationed in city center #2081
* #2081
Added unique to landsknecht and changed condition for movement panelty
* Refactored when statement to if
#2081
* Only one plane at a time can be purchased to a maximum of 6 that are NOT transported in a single city
#2081
* removed duplicate code
#2081
* refactor canPurchase() and now track bought units in a city in a mutableList
#2081
* refactor canPurchase() it basicly just tracks if the unit can be placed on the center tile! if it cant then we dont allow the purchase!
#2081
* Changed wording of unique and added translations
#2081
* Changed wording of unique
#2081
* removed unneeded imports
#2081
Co-authored-by: Yair Morgenstern <yairm210@hotmail.com>
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