chore: rename parameter serializer error

fix: allow to convert all enums using System.Convert class

feat: add service collection extensions for adding packet serializer

chore: change name of directory.build.props to work on Linux

feat: add errors for converting packets

feat: add char and string type converters

feat: implement packet serializer

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