fix: Drastically simplifies regions

[kamronbatman]

Summary

• Gets rid of the Dtos
• Simplifies the json serializer registration
• Adds a custom RegionByName JsonConverter that can look up other regions that have already been registered.

BREAKING CHANGE

1. Child regions must appear after their parents in the JSON file
2. In the regions json file, "Parent" can no longer be just a string. It must be an object that includes the map.

   • "Parent": { "Name": "Britain", "Map": "Felucca" }