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/pages/.pi-map.index.md

@@ -0,0 +1,25 @@
+# apps/web/src/styles/pages (index)
+dir: apps/web/src/styles/pages
+
+## role
+Contains page-specific CSS stylesheets for distinct application views in the web frontend.
+## parent
+index: apps/web/src/styles/.pi-map.index.md
+map: apps/web/src/styles/.pi-map.md
+## children
+-
+## files
+- git-history.css
+- projects.css
+- repo-workspace.css
+- sessions.css
+- ssh-keys.css
+- workspace-detail.css
+- workspaces.css
+## links
+index: apps/web/src/styles/pages/.pi-map.index.md
+map: apps/web/src/styles/pages/.pi-map.md
+## workflows
+-
+## dirty
+-