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/modules/.._test-project_src_utils.py.md

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+# Module: ../test-project/src/utils.py
+
+No summary available
+
+## Symbols
+
+### load_config
+
+def load_config(...)
+
+No documentation available
+
+**Type:** Function
+
+**Metrics:**
+- Fan-in: 0
+- Fan-out: 0
+
+### save_config
+
+def save_config(...)
+
+No documentation available
+
+**Type:** Function
+
+**Metrics:**
+- Fan-in: 0
+- Fan-out: 0
+
+### get_file_size
+
+def get_file_size(...)
+
+No documentation available
+
+**Type:** Function
+
+**Metrics:**
+- Fan-in: 0
+- Fan-out: 0
+
+### format_bytes
+
+def format_bytes(...)
+
+No documentation available
+
+**Type:** Function
+
+**Metrics:**
+- Fan-in: 0
+- Fan-out: 0
+
+
+## Dependencies
+
+### Imports
+- json
+- os
+
+### Outbound Modules
+
+### Inbound Modules
+
+## Integrations
+
+
+
+
+## Usage Examples
+
+```python
+// Example usage of module functions
+// TODO: Add real usage examples based on module analysis
+```
+