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
+---
+# Navigation service
+
+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
+
+Runs on the Orin. Answers routing questions and publishes turn-by-turn guidance
+onto the message bus, so no display has to know where routes come from.
+
+Routing is served by a local Valhalla instance against artifacts built by
+[tool-mapmint](gitea:yukart/tool-mapmint), which is the offline-capable default.
+The provider is kept behind an interface so a cloud routing API can be swapped in
+without touching anything downstream.
+
+- For implementation practice guidelines, refer to the [guidelines](docs/GUIDELINES.md);  
+- For implementation plans and history, refer to [them](docs/impl/);