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

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

Merge pull request #52 from Rutherther/feat/optional-wrapper

Add optional wrapper

feat(packets): fix clist packet pets sub packet type

Merge pull request #45 from Rutherther/feat/mates

Add support for mates

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

feat(packets): add many new packets