Upgradeable traits are notified whenever an upgrade of their declared types are granted or revoked. The traits maintain their own internal level counter, which is then used to enable or disable the trait functionality. A trait can register for multiple upgrade types which then all affect the internal level counter.
IDisabledTrait for identifying (and filtering) disabled traits
UpgradableTrait provides an abstract base for traits to support upgrade levels
Added IDisabledTrait support to GlobalButtonOrderGenerator
Includes rework by pchote with alterations.
Changes included:
Warhead code split out of weapon code and refactored.
Warhead functionality now split into several classes, each handling one effect/impact.
Additional custom warheads can now be defined and called via yaml.
Custom warheads inherit the abstract class Warhead,
which provides target check functions.
Custom warheads have to define their own impact functions,
and can also define their own replacement for check
functions.
