build: phase 0 infrastructure setup
- Project structure: solver/, freecad/, export/, configs/, scripts/, tests/, docs/
- pyproject.toml with dependency groups: core, train, freecad, dev
- Hydra configs: dataset (synthetic, fusion360), model (baseline, gat), training (pretrain, finetune), export (production)
- Dockerfile with CUDA+PyG GPU and CPU-only targets
- docker-compose.yml for train, test, data-gen services
- Makefile with targets: train, test, lint, format, type-check, data-gen, export, check
- Pre-commit hooks: ruff, mypy, conventional commits
- Gitea Actions CI: lint, type-check, test on push/PR
- README with setup and usage instructions
forbes-0023
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