ModelCraft foundation: workspace, quality gates, FE model, command engine, geometry boundary

A pure-Rust CAE modeling workspace following the SolidCraft conventions:
- modelcraft-model: nodes and elements by label with hostile-input validation
- modelcraft-geometry: SolidCraft's kernel (pinned git dependency) behind our own API;
  tessellation into a face-tagged boundary surface for volume meshing
- modelcraft-engine: CommandSpec registry, Session::execute with rollback and panic guard,
  scripts and a journal
- modelcraft-cli: list commands, run scripts
- xtask: layers (only geometry may use solidcraft-*), assets, licences, tests, wasm, ci
- AGENTS.md, architecture, ADR 0001 (libraries and licences), roadmap, CI

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

README.md

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+# ModelCraft
+
+An open-source, clean-room CAE modeling application in pure Rust: geometry to analysis-ready
+finite element models, with robust tetrahedral and hexahedral meshing, solver decks for Abaqus,
+Nastran and LS-DYNA, and its own linear static and modal solver. Desktop, browser and AI agents
+drive the same commands.
+
+**Status:** early. The workspace, quality gates, the FE model, the command engine and the
+geometry boundary (SolidCraft's kernel and tessellator) are in place; meshing is next. See
+[ROADMAP.md](ROADMAP.md).
+
+## Build
+
+```sh
+cargo xtask ci                                  # fmt, assets, licences, layers, clippy, tests, wasm
+cargo run -p modelcraft-cli -- commands         # every command and its parameters
+cargo run -p modelcraft-cli -- run script.json  # run a command script
+```
+
+Rust 1.95 or later, with the `wasm32-unknown-unknown` target for `cargo xtask ci`.
+
+## Documentation
+
+- [Architecture](docs/architecture.md): crates, layers and the meshing pipeline
+- [Libraries and licences](docs/adr/0001-libraries.md)
+- [Contributing](CONTRIBUTING.md) and [agent instructions](AGENTS.md)
+
+## License
+
+Dual-licensed under [MIT](LICENSE-MIT) or [Apache-2.0](LICENSE-APACHE), at your option. Notices
+are in [NOTICE](NOTICE); third-party licences in [THIRD-PARTY-LICENSES.txt](THIRD-PARTY-LICENSES.txt).
+
+ModelCraft is an independent project, not affiliated with, sponsored or endorsed by Dassault
+Systèmes, MSC Software, Siemens or Ansys. Abaqus, Nastran, MSC Nastran, Simcenter Nastran and
+LS-DYNA are trademarks of their owners and are named only to describe file compatibility.