Reorganize documentation into canonical repository layout

Adopt CoulombSocial/HelixForge/MarkiTect documentation structure:
- research/260608-yawex-prior-art/ — yawex exploration and sources
- demand/ — inbound NetKingdom integration requirements
- spec/ — PRD, TSD, UseCaseCatalog, ArchitectureBlueprint scaffolds
- docs/ — stakeholder documentation and repository-layout guide
- wiki/, issues/, history/ — scaffolded directories

Add SCOPE.md and AGENTS.md. Update workplan paths and README.

docs/README.md

@@ -0,0 +1,14 @@
+# docs/
+
+Stakeholder-facing documentation for users, developers, humans, and agents.
+
+Rewrite docs when they become wrong or stale — they should reflect what the
+repo actually does.
+
+| Document | Audience |
+|----------|----------|
+| `repository-layout.md` | All — how documentation is organized in this repo |
+| `../README.md` | New visitors — project entry point |
+| `../AGENTS.md` | Agents — working conventions and layout |
+| `../INTENT.md` | Architects — aspiration and boundaries |
+| `../SCOPE.md` | Contributors — current achievement and planning |