LAMDA-Tabular/CausalArena-leaderboard

Update CausalArena leaderboard

Fix method metadata implementation links

Remove intervention protocol detail table

Remove duplicate real-data tables

Update CausalArena leaderboard dashboard

Update CausalArena leaderboard UI

Simplify submit page

Use HuggingFace PR workflow for submissions

Update leaderboard submit workflow

Clarify public and held-out leaderboard states

Update leaderboard navigation and submission workflow

Update CausalArena leaderboard space

initial commit