Reset Falsiflow core for v0.2.0

[AzurLiu]

Summary

Reset Falsiflow v0.2.0 to the core numeric claim gate: project config + evidence CSV + source files -> claim_ready or claim_blocked.

This removes the broad v0.1.x experimental surface from the maintained package: discovery, demos, launch tooling, MCP, template supply-chain, adoption/release checks, public demo assets, material/RFQ data, and generated reports.

What Changed

• Public CLI is now falsiflow check plus falsiflow schema.
• claim-check remains only as a hidden compatibility alias to check.
• Core package is reduced to core.py, bundle.py, claim_check.py, and cli.py.
• GitHub Action now supports only mode: check, with claim-check accepted as a legacy alias.
• CI now covers compile, regression, minimal example smoke, local Action smoke, and build/twine validation.
• Publish workflow builds/checks distributions and runs a wheel-installed falsiflow check smoke.
• README, contribution/security docs, issue/PR templates, manifest, and changelog were simplified for the v0.2 surface.

Validation

• make test
• python3 scripts/falsiflow_tests/regress_falsiflow_core.py
• python3 scripts/falsiflow.py --help confirmed only check and schema appear.
• python3 -m build using a temporary build venv.
• python3 -m twine check dist/* passed.
• Installed dist/falsiflow-0.2.0-py3-none-any.whl in a fresh venv and ran ready + placeholder examples.
• Inspected sdist contents: 41 files, no deleted docs/data/reports/public_demo/templates/launch assets.

Release Note

Do not tag or publish PyPI from this branch until PR CI is green. v0.1.39 remains the history/tag for the old broad experimental surface.