chore: move PacketSerializer types to correct namespace

feat!(core): make some classes internal

feat(core): add command pre and post events

feat(core): add stateful entities support

Supports injecting entities depending on the current nostale client.
Useful for remote, pipe client etc.

feat(core): add pre and post responder events

feat(core): add walk command for moving the player as well as pets simultaneously

feat(core): add command for taking control

Allows only one silmutaneous action in the given group, user cancellable

Merge pull request #12 from Rutherther/packets

Implement custom packet serializer

chore: remove NosCore dependency

chore: fix line endings

Merge branch 'in-packet-serialize' into 'main'

Serialize IN packet

See merge request Rutherther/nos-smooth!3

feat: register in packet specific serializer to DI

fix: pass correct arguments to serializer provider

feat: add support for specific serializers

Specific serializers give the ability to add custom behavior for some packets that may be harder to serialize

chore: add stylecop, ensure stylecop rules are met

Initial commit