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).

apps/web/src/components/.pi-map.index.md

@@ -0,0 +1,34 @@
+# apps/web/src/components (index)
+dir: apps/web/src/components
+
+## role
+Provides reusable, foundational React UI components and utilities for the web application, including layout shell, data visualization, navigation guards, and user feedback systems.
+## parent
+index: apps/web/src/.pi-map.index.md
+map: apps/web/src/.pi-map.md
+## children
+- apps/web/src/components/features
+  index: apps/web/src/components/features/.pi-map.index.md
+  map: apps/web/src/components/features/.pi-map.md
+## files
+- app-shell.tsx
+- code-editor.tsx
+- data-states.tsx
+- icon.tsx
+- protected-route.test.tsx
+- protected-route.tsx
+- syntax-highlighter.tsx
+- toast-rules.test.ts
+- toast-rules.ts
+## links
+index: apps/web/src/components/.pi-map.index.md
+map: apps/web/src/components/.pi-map.md
+## workflows
+- change components behavior
+  read: app-shell.tsx, code-editor.tsx, data-states.tsx
+- update components tests
+  read: protected-route.test.tsx, toast-rules.test.ts
+- explore components subdirectories
+  index: apps/web/src/components/features/.pi-map.index.md
+## dirty
+-