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/specs/repo-clone-mode/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/specs/repo-clone-mode
+dir: openspec/specs/repo-clone-mode
+
+index: openspec/specs/repo-clone-mode/.pi-map.index.md
+
+## role
+Defines the contract for host-side git repository cloning operations to enable containerized tools to work with local code.
+## files
+- spec.md | Specifies requirements for host-side git repository cloning with SSH key preparation and dirty state detection for containerized tool instances. | dep: GitRepository, ToolInstance, SSHKey, Docker Compose, Git, pytest, mypy, ruff, npm
+## arch
+Specification-driven design using markdown-based requirements documentation with SSH key management and dirty-state detection concerns.
+## tags
+git, spec, specifies, requirements, host, side, repository, cloning
+## symbols
+-
+## workflows
+-
+## dirty
+-