feat: allow nullables in converters

feat: add interfaces for serializers, converters

feat: add base packet types converting

feat: add Packets and PacketTests projects

chore: add file header setting

chore: move build props to correct case

chore: add unix solution without windows-only solutions

chore: add MIT license

chore: fix line endings

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

Serialize IN packet

See merge request Rutherther/nos-smooth!3

chore: update NosCore.Packets

fix: serialize in packet correctly

tests: add tests for in packet serializer

feat: register in packet specific serializer to DI

feat: add in packet specific serializer

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

fix: not walking too long did not cancel the command handling

Merge branch 'walk-command-handler' into 'main'

Walk command handler

Closes #4

See merge request Rutherther/nos-smooth!2

feat: implement walk command handler