[FEATURE]: Change config file names to be consistent

[trevorb1]

Idea

In the config file, variable definitions jump around from being snake case to camel case and it is a little awkward

For example, see the definition of geographic scope and crossborder trade

# Spatial Parameters 
geographic_scope:
    - 'IND'
crossborderTrade: True

Is your feature related to a bug?

na

Suggested Soltuion

I would switch everything to be in snakecase, to match python guidlines. But if yaml has its own standards we should probably follow those!

Additional Info

No response