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/styles/.pi-map.index.md

@@ -0,0 +1,24 @@
+# apps/web/src/styles (index)
+dir: apps/web/src/styles
+
+## role
+Houses the complete CSS styling system for a web application, providing global styles, design tokens, syntax highlighting, and utility classes.
+## parent
+index: apps/web/src/.pi-map.index.md
+map: apps/web/src/.pi-map.md
+## children
+- apps/web/src/styles/pages
+  index: apps/web/src/styles/pages/.pi-map.index.md
+  map: apps/web/src/styles/pages/.pi-map.md
+## files
+- global.css
+- syntax-highlight.css
+- tokens.css
+- utilities.css
+## links
+index: apps/web/src/styles/.pi-map.index.md
+map: apps/web/src/styles/.pi-map.md
+## workflows
+-
+## dirty
+-