feat: add SQL input hints and update instructions for interactive mode in playground.html

chore: update project descriptions to reflect SQL-RL branding in openenv.yaml, pyproject.toml, and README.md

remove: delete compiled Python files from __pycache__ directories

hf done

hf

good to go

good to go

hf issues now fixed

refactor: update README for SQL AI Data Analyst, enhance installation instructions, and improve architecture workflow; modify app initialization in server to use SqlEnvironment directly

feat: implement SQL agent environment with OpenEnv integration, SQLite management, and automated task grading

file structure created

initial commit