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).

tool-images/.pi-map.index.md

@@ -0,0 +1,24 @@
+# tool-images (index)
+dir: tool-images
+
+## role
+Provides containerized development environment templates for various IDE, notebook, and AI agent tools used in the Headquarter platform.
+## parent
+index: ./.pi-map.index.md
+map: ./.pi-map.md
+## children
+-
+## files
+- README.md
+- base.dockerfile
+- code-server.dockerfile
+- jupyter.dockerfile
+- opencode.dockerfile
+- pi-agent.dockerfile
+## links
+index: tool-images/.pi-map.index.md
+map: tool-images/.pi-map.md
+## workflows
+-
+## dirty
+-