docs: add comprehensive README

feat: add pyproject.toml

feat: add reason_first_program/experiment.py

feat: add reason_first_program/steering.py

feat: add reason_first_program/embeddings.py

feat: add reason_first_program/concepts.py

feat: add reason_first_program/sampling.py

feat: add reason_first_program/program_space.py

feat: add reason_first_program/stub.py

feat: add reason-first-program framework

initial commit