Scaffold repo: docs layout, guidelines and initial plan

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013kj58Jugkic783b8ZrtTVZ

README.md

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+---
+type: default
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+# Map artifact minting
+
+Part of **Project Yukart**, making an old 2008 Mitsubishi Z27AG a bit smarter with modern technologies.  
+This file serves as the minimalist portal to other docs
+
+
+## What this repo is about
+
+Workstation-side batch pipeline. Turns upstream OpenStreetMap into the two
+artifacts the car needs, which are unrelated to each other and built by different
+tools:
+
+| Artifact | Built by | Consumed by |
+|---|---|---|
+| Valhalla routing tiles — the road graph | `valhalla_build_tiles` | [svc-nav](gitea:yukart/svc-nav) |
+| Protomaps PMTiles basemap — the picture | `go-pmtiles` | [app-flutter](gitea:yukart/app-flutter) |
+
+**Nothing here runs on the Orin.** These are one-off jobs wanting RAM, cores and
+disk; the Orin only ever receives the output.
+
+- For implementation practice guidelines, refer to the [guidelines](docs/GUIDELINES.md);  
+- For implementation plans and history, refer to [them](docs/impl/);