feat(renderer): implement module-level documentation generation

- Added module_md template to renderer for generating detailed module documentation
- Updated CLI to use renderer for module docs with fallback to simple template
- Generated module documentation for test project files with symbols, dependencies, and integrations
- Added proper error handling when module rendering fails

This implements the core functionality for generating detailed architectural documentation at the module level, including symbols, dependencies, and integration points.

test-project/docs/architecture/files/.._test-project_src___init__.py.md

@@ -0,0 +1,3 @@
+# File: ../test-project/src/__init__.py
+
+TODO: Add file documentation