updating database conventions

Update slate handling in seed frame initialization for DK and FD to replace 'Auxiliary Slate' with 'Late Slate' for improved accuracy in data retrieval.

Refactor seed frame initialization functions to handle multiple slate types for DraftKings and FanDuel, improving data retrieval and organization based on slate selection.

Add database connection module and refactor Streamlit app to utilize it, improving code organization and data handling for simulations.

Refactor initialization functions in Streamlit app to remove database argument, streamlining data loading for DraftKings and FanDuel simulations.

adding db args

held the folder in the wrong spot