feat(packets): pass nullable to packet serializers

Merge pull request #45 from Rutherther/feat/mates

Add support for mates

fix(packets): make nullable wrapper a class

feat(packets): add nullable wrapper to represent a compoud type that may be null as a whole

fix(packets): try to find specific serializer before building one using a generator

chore: update versions

fix(packets): make UpgradeRare packet deserialize correctly

fix(packets): make UpgradeRareSubPacket converter work with "0"

chore: update PacketSerializer version

fix(packets): add missing usings

feat(packets): do not add the same packet multiple times

chore: move PacketSerializer types to correct namespace

Merge pull request #32 from Rutherther/combat

Add combat extension

chore: update versions

fix(packets): parse 0 UpgradeRareSubPacket as 0, 0

chore: update dependencies

chore: update to .NET 7

chore: update versions

fix(packets): seek when nullable converter finds null.

chore: add repository url and license to nuget