Revamp documentation and remove unused text files

Update dev dependencies and mypy config

Add type stubs for openai and anthropic to dev dependencies

Remove unused imports in providers.py

Refactor providers and update config exclusions

Update .gitignore and add experiment files

Refactor import order and cleanup unused imports

Refactor CLI entrypoint and add string calculator demo

Reorder and clean up import statements

Refactor import statements for clarity

Update .gitignore

style(ruff): organize imports & split multi-imports

Refactor ruff and pytest config in pyproject.toml

chore: repo policies and contributing

test: orchestrator stub test