v0.1.0 - Portable tri-party core

Initial public release of Tri-party Framework.\n\nIncludes:\n- Portable Codex + Claude + Gemini workflow core.\n- Preflight, independent review, mutual cross-audit, and merge gate.\n- Machine-readable state.json contract.\n- HTTP and MCP adapters.\n- Offline artifact injection and resume flow.\n- Public launch docs, MIT license, contributing guide, security notes, examples, and release checklist.\n\nVerification before release:\n- scripts/triparty-lint.sh passed.\n- scripts/triparty-regression.sh passed.\n- scripts/triparty-adapter-smoke.sh passed.\n- scripts/triparty-mcp-smoke.sh passed.\n- Tri-party review run docs/framework/runs/review-20260601-152651 reached true_triparty_ready: true locally.\n\nA result is true tri-party only when state.json says true_triparty_ready: true.