feat: refactor app.py to load data from a JSONL file, enhance the leaderboard display, and improve the "About" section layout with new branding and community links. Remove outdated leaderboard_data.json file.

feat: update description

Update README.md to refine the short description of the Inference Providers Leaderboard for improved clarity.

Refactor app.py to implement a new leaderboard for inference providers, focusing on cost, quality, and speed. Added data processing from a new CSV file and updated the Gradio interface. Removed unused modules and files to streamline the codebase.

initial commit

Duplicate from demo-leaderboard-backend/leaderboard