chore: track all project map and index files

Add generated .pi-map.md and .pi-map.index.md files across the repository
so the project navigation maps are shared and versioned. These artifacts
are maintained by project_map_init/patch/validate and must be kept in
sync with source edits.

Note: .cache/ remains ignored (added in previous commit).

docs/.pi-map.index.md

@@ -0,0 +1,42 @@
+# docs (index)
+dir: docs
+
+## role
+Central documentation hub and knowledge base for the Headquarter platform, providing navigation and access to all project guides, API references, and technical resources.
+## parent
+index: ./.pi-map.index.md
+map: ./.pi-map.md
+## children
+- docs/api
+  index: docs/api/.pi-map.index.md
+  map: docs/api/.pi-map.md
+- docs/architecture
+  index: docs/architecture/.pi-map.index.md
+  map: docs/architecture/.pi-map.md
+- docs/deployment
+  index: docs/deployment/.pi-map.index.md
+  map: docs/deployment/.pi-map.md
+- docs/development
+  index: docs/development/.pi-map.index.md
+  map: docs/development/.pi-map.md
+- docs/features
+  index: docs/features/.pi-map.index.md
+  map: docs/features/.pi-map.md
+- docs/guides
+  index: docs/guides/.pi-map.index.md
+  map: docs/guides/.pi-map.md
+- docs/superpowers
+  index: docs/superpowers/.pi-map.index.md
+  map: docs/superpowers/.pi-map.md
+- docs/templates
+  index: docs/templates/.pi-map.index.md
+  map: docs/templates/.pi-map.md
+## files
+- README.md
+## links
+index: docs/.pi-map.index.md
+map: docs/.pi-map.md
+## workflows
+-
+## dirty
+-