feat(core): split raw client and managed client as well as packet handlers

Resolves #65

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

Make combat nonblocking, make multiple queues for distinct operations

feat(game): cancel the skill contract in case no response is obtained

Merge pull request #55 from Rutherther/feat/contracts

Add contract system

chore: use specific errors instead of GenericError

Merge pull request #51 from Rutherther/feat/easy-api

Add easy apis for various things

feat(game): update skills api to allow using skills on self (character)

chore: make updates to get rid of warnings

fix(packets): correctly use cast id instead of vnum in UseSkill packet

Merge pull request #8 from Rutherther/game-objects

Game objects

fix: use correct namespaces inside of game project

fix: use nos smooth packets in game

feat: add packet api for chat and skills