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.

README.md

@@ -0,0 +1,41 @@
+# Gig Line
+
+A Linux-first Unreal Engine game about walking and driving through a real city. The first release, `0.1.0`, is a walkable exterior demo around **6840 Hollywood Blvd / El Capitan Entertainment Centre**, covering the south-side frontage between Highland Avenue and Orange Drive plus the north-side frontage within 50 m of the boulevard.
+
+## Status
+
+Pre-production. Workstation setup and repository scaffolding are in progress; no engine, content, or geographic data is committed yet. Current state is tracked in [ROADMAP.md](ROADMAP.md), and the per-task setup state in [Docs/setup.md](Docs/setup.md).
+
+## Layout
+
+| Path | Contents |
+| --- | --- |
+| `Game/` | Unreal project, configuration, source, game-ready content |
+| `Art/` | Editable Blender files and original textures |
+| `Geo/` | Source manifests, permitted geographic data, processing scripts |
+| `Tools/` | Repeatable import/export helpers |
+| `Docs/` | Setup, toolchain pins, licensing, release checks |
+
+## Getting started
+
+```bash
+git lfs install    # required: content, images, audio, and geo files are LFS-tracked
+git lfs pull
+```
+
+The engine is installed outside the repository and pinned in [Docs/toolchain.md](Docs/toolchain.md). The full procedure is in [Docs/setup.md](Docs/setup.md).
+
+## Documents
+
+- [ROADMAP.md](ROADMAP.md) — living task list, source of truth for progress
+- [PLAN.md](PLAN.md) — scope, stack, release policy, timeline
+- [AGENTS.md](AGENTS.md) — contributor and agent rules
+- [Docs/toolchain.md](Docs/toolchain.md) — pinned versions
+- [Docs/environment.md](Docs/environment.md) — workstation audit
+- [Docs/release-checks.md](Docs/release-checks.md) — release gate definitions
+- [Docs/licensing.md](Docs/licensing.md) and [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md) — licensing
+- [CHANGELOG.md](CHANGELOG.md) — release history
+
+## Licensing
+
+Code licence is an open decision (MIT proposed). Engine, art, and geographic data are licensed separately; see [Docs/licensing.md](Docs/licensing.md). OSM-derived output carries "© OpenStreetMap contributors".