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

Resolves #65

chore: add async analyzer and meet its standards

feat(samples): update file client QoL

fix: correct usings

chore: move PacketSerializer types to correct namespace

feat(packets): merge send and receive packet handling to one method

feat(samples): update file client

feat(samples): use correct handle packet

Merge pull request #8 from Rutherther/game-objects

Game objects

feat(samples): add sample with loading data from a file