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/features/git/.pi-map.index.md

@@ -0,0 +1,25 @@
+# apps/web/src/components/features/git (index)
+dir: apps/web/src/components/features/git
+
+## role
+React components providing Git repository management UI including commit, merge, branch operations, and file editing with syntax highlighting.
+## parent
+index: apps/web/src/components/features/.pi-map.index.md
+map: apps/web/src/components/features/.pi-map.md
+## children
+-
+## files
+- commit-dialog.tsx
+- commit-panel.tsx
+- file-editor.tsx
+- git-mount-editor.tsx
+- git-toolbar.tsx
+- merge-dialog.tsx
+## links
+index: apps/web/src/components/features/git/.pi-map.index.md
+map: apps/web/src/components/features/git/.pi-map.md
+## workflows
+- change git behavior
+  read: commit-dialog.tsx, commit-panel.tsx, file-editor.tsx
+## dirty
+-