[Cleanup] Cleanup Body Type Code

[Kinglykrab]

Description

• Introduces a BodyType namespace for stuff like IsValid.
• Cleans up a lot of the logic in finding a body type, checking for a valid body type, etc.
• Adds #find body_type subcommand.

Type of Change

• New feature

Testing

• Logged in game, ran around, didn't notice any issues, can post screenshots or videos as necessary if there is specific functionality we need tested.
  
  

Checklist

• I have tested my changes
• I have performed a self-review of my code. Ensuring variables, functions and methods are named in a human-readable way, comments are added only where naming of variables, functions and methods can't give enough context.
• I own the changes of my code and take responsibility for the potential issues that occur