Fix case sensitivity in database collection names for Draftkings and Fanduel in app.py

Enhance app.py: Added auxiliary seed frame functions for Draftkings and Fanduel, updated data handling for secondary and auxiliary slates, and modified UI options for slate selection.

Refactor app.py: Removed unused CSS styling and validation steps for player lineups; adjusted indexing for team and stack filtering based on site selection.

Initial Commit

initial commit