fix(combat): do not cancel cancellation token after disposing it

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

feat(combat): allow cancelling operations

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

docs: add missing documentation

chore(combat): use local dependencies instead of NuGet

chore(combat): update version

fix(combat): prevent using combo skills until support is added

fix(data): correctly parse special cost

feat(game): add check for combo skill

feat(data): add skill cost, item vnum, dash, upgrade

feat(combat): add compound operation to simplify using skills

feat(combat): correctly handle dash range in simple attack technique

feat(combat): add method for removing current operation from combat state

chore(core): update version

fix(core): save CurrentState to avoid race condition

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

feat(game): keep only skills of type Player in player's skills

feat(game): make sure skill cooldown reset is interpreted correctly when sent before "su"

feat(pathfinding): respond to su, tp, c_info packets to update position