MobaPlayer class rework

[sturdy-robot]

The MobaPlayer class has too many attributes. It should be a simple dataclass.

• Convert MobaPlayer and Player to dataclasses
• Add other classes that use MobaPlayer as a component, such as MobaPlayerStats and MobaPlayerSimulation to divide responsibilities
• Add a serialize() method to return a dictionary of the player (Probably derive from a common Serializable interface). This makes it easier to write this to a database.
• Make all fields accept the same types:
  • UUID for ID
  • date for date of birth
• Add get_from_dict() method to make it easier to deserialize data from a dictionary. It makes it easier to load from a database.
• Remove Skill implementation, to use a different approach