chore: add ci tests

tests: update, fix tests

feat(packets): make prepared level part of CurrentLevel in PacketStringBuilder similar to PacketStringEnumerator

fix(packets): add missing fields to pinit mate subpacket

fix(game): respect family sub packet nullability

feat(packets): make clist sub packet pet vnum and skin not nullable

tests: fix tests for new version

chore: update versions

feat(packets): allow multiple packet headers

chore: update versions

fix(packets): nullability of family

fix(game): parse null inv sub packets correctly

fix(packets): make inv sub packets optional

fix(packets): make gidx family sub packet nullable, family icons optional

chore: update nuget push to work only on release published

docs: add optional wrapper present parameter documentation

chore: remove nuget NosSmooth.Data.Abstractions dependency

chore: update versions

Merge branch 'main' of github.com:Rutherther/NosSmooth

feat(packets): make in non player unknown4, unknown5 optional