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

Resolves #65

chore: add async analyzer and meet its standards

chore: move PacketSerializer types to correct namespace

feat(core): add command pre and post events

feat: split packets definitions into separate assembly

Merge pull request #12 from Rutherther/packets

Implement custom packet serializer

chore: remove NosCore dependency

chore: fix line endings

chore: add stylecop, ensure stylecop rules are met

Initial commit