chore: move PacketSerializer types to correct namespace

chore: update dependencies

chore: update to .NET 7

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

feat(samples): update file client

feat(samples): use correct handle packet

chore: make file client non packable

Merge pull request #8 from Rutherther/game-objects

Game objects

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