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).

openspec/changes/config-profile-multi-repo-mounts/.pi-map.index.md

@@ -0,0 +1,19 @@
+# openspec/changes/config-profile-multi-repo-mounts (index)
+dir: openspec/changes/config-profile-multi-repo-mounts
+
+## role
+Defines a completed feature specification for enabling multiple source/target mappings per git mount entry in Config Profiles with single repository cloning.
+## parent
+index: openspec/changes/.pi-map.index.md
+map: openspec/changes/.pi-map.md
+## children
+-
+## files
+- .openspec.yaml
+## links
+index: openspec/changes/config-profile-multi-repo-mounts/.pi-map.index.md
+map: openspec/changes/config-profile-multi-repo-mounts/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/changes/config-profile-multi-repo-mounts/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/changes/config-profile-multi-repo-mounts
+dir: openspec/changes/config-profile-multi-repo-mounts
+
+index: openspec/changes/config-profile-multi-repo-mounts/.pi-map.index.md
+
+## role
+Defines a completed feature specification for enabling multiple source/target mappings per git mount entry in Config Profiles with single repository cloning.
+## files
+- .openspec.yaml | Define a completed feature specification for enabling multiple source/target mappings per git mount entry in Config Profiles with single repository cloning
+## arch
+Specification-driven development using OpenSpec YAML format for structured feature documentation with implementation status tracking.
+## tags
+.openspec, define, completed, feature, specification, enabling, multiple, source
+## symbols
+-
+## workflows
+-
+## dirty
+-