chore: bootstrap project structure

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.wiki/index.md

@@ -0,0 +1,23 @@
+# Wiki Index
+
+Catalog of all wiki pages. One line per page, organized by type. Updated on every ingest / new page.
+
+## Overview
+
+- [overview.md](overview.md) — project overview
+
+## Entities
+
+<!-- (none yet) -->
+
+## Concepts
+
+<!-- (none yet) -->
+
+## Packages
+
+<!-- (none yet) -->
+
+## Sources
+
+<!-- (none yet) -->