feat(tests): add Ski packet test

fix(game): create npc instead of monster in InResponder

chore(data): add cast time and cooldown units to documentation

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(packets): parse 0 UpgradeRareSubPacket as 0, 0

fix(packets): Add new unknown field to ski packet, make rank of SkiSubPacket optional

fix(packets): make skill effect in SuPacket nullable

fix(pathfinding): return custom PathNotFoundError instead of NotFoundError

feat(pathfinding): add user cancelling to walk manager

feat(pathfinding): create custom pathfinding

chore: update dependencies

fix(combat): adjust walk in range behavior to not sit idle too much

fix(combat): cancel combat when cancellation token is cancelled

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

More player like behavior.

fix(combat): null skill after it was used

fix(combat): dispose cancellation token in use skill

feat(combat): reset walk in range operation if the target moved

fix(combat): reset attack command if new target is different

fix(combat): make skill cancellation tokens actions async

feat(combat): make target id long