Add Repair and Pillaging Roads (#8015)

* Reapply Changes

* Logic clean up

* Adding getImprovementToPillage() and getRepairableImprovement()

* Cleaning up Unit Actions

* getImprovementToPillage() needs to check for Unpillagable

* Remove redundant logic since canBuildImprovement() returns true if currently repairing

* More redundant logic

* Prevent City Center from being Pillage status
addRepairAction will not show a Repair Action
Adding the improvement to be repaired/pillaged in button text
Utilizing getImprovementToPillage() more

* Some import cleanup
Add Irremovable to blockers
More consolidation of code

* More translation files

* When improvements/roads are built/removed, pillaged flag set to False

* Better and more consistent logic

* Fix dumb logic bug

core/src/com/unciv/Constants.kt

@@ -75,6 +75,7 @@ object Constants {
     const val rising = "Rising"
     const val lowering = "Lowering"
     const val remove = "Remove "
+    const val repair = "Repair"
 
     const val uniqueOrDelimiter = "\" OR \""