feat(game): make game stateful entity

feat(core): add stateful entities support

Supports injecting entities depending on the current nostale client.
Useful for remote, pipe client etc.

feat(core): add map changed walk unfinished reason

feat(core): add pre and post responder events

feat(core): add walk command error

Merge pull request #8 from Rutherther/game-objects

Game objects

chore(game): add nuget information

chore(game): update project

feat(game): remove character died event in favor of entity died

feat(game): use entity stunned event instead of character stunned

feat(game): add character sp points

feat(game): add handling of packets for maps and entities

feat(game): add basic entity and map data

fix: use correct namespaces inside of game project

feat: extract game semaphores logic

feat: add effects to living entities

fix: use new packets in game responders

feat: implement cinfo packet

fix: use nos smooth packets in game

chore: add IsExternalInit to fix records for netstandard 2.0