chore: scaffold repository and record 0.1.0 setup state

Create Game/, Art/, Geo/, Tools/, Docs/ with LFS and ignore rules, record the
workstation audit, toolchain pins, setup checklist, release checks, and
licensing policy. ROADMAP 0.1.0 environment tasks marked to match verified state.

Art/README.md

@@ -0,0 +1,19 @@
+# Art
+
+Editable sources and original textures. Exported, game-ready output goes to `Game/Content/`.
+
+## Layout (as content arrives)
+
+| Path | Contents |
+| --- | --- |
+| `Art/blender/` | `.blend` sources, one file per building or asset family |
+| `Art/textures/` | Original texture sources before baking or compression |
+| `Art/reference/` | Licensed reference photography, development only — see attribution rules |
+
+## Rules
+
+- Every `.blend` saves with a real-world metric scene scale. No exceptions; scale drift is the main source of import defects.
+- Named export presets only. Record the preset name and its settings next to the asset that used it.
+- Textures enter as a documented source (author, licence, source URL) and are listed in [../THIRD_PARTY_NOTICES.md](../THIRD_PARTY_NOTICES.md).
+- Reference photography stays out of the shipped build. It is evidence, not content, and its licences are recorded before it is committed.
+- `.blend` files are LFS-tracked and lockable; pull before editing.