feat(combat): add possibility to cancel operation to quit the combat state early

feat(combat): make waiting return an error with information about waiting information

fix(combat): do not register contracts that failed to execute

fix(combat): use dash on character if needed

Merge pull request #60 from Rutherther/feat/combat-v1

Make combat nonblocking, make multiple queues for distinct operations

feat(combat): support dash in use skill operation

fix(combat): return use skill operation finished in case of an error

feat(combat): update operations to be non-blocking, add support for handling waiting

feat(combat): support self targeted and area skills

Merge pull request #32 from Rutherther/combat

Add combat extension

fix(combat): wait for a second after casting a skill

This seems to be the "reload" period needed until
the character may move again

fix(combat): wait for a while after using a skill

More player like behavior.

fix(combat): dispose cancellation token in use skill

fix(combat): make skill cancellation tokens actions async

feat(combat): add combat operations