docs: add mkdocs, update links, add architecture documentation

docs/content/stories/phase8/8.7.53-additional-modules.md

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+# Task 8.7.53: Additional modules
+
+## Metadata
+- **Task ID**: 8.7.53
+- **Title**: Additional modules
+- **Phase**: 8 - Advanced Features & Polish
+- **Section**: 8.7
+- **Status**: Pending
+- **Priority**: High
+- **Estimated Time**: TBD
+- **Dependencies**: TBD
+
+## Description
+Additional modules
+
+## Requirements
+- Additional modules
+
+## Implementation Steps
+1. TODO: Add implementation steps
+2. TODO: Add implementation steps
+3. TODO: Add implementation steps
+
+## Acceptance Criteria
+- [ ] Task 8.7.53 is completed
+- [ ] All requirements are met
+- [ ] Code compiles and tests pass
+
+## Related ADRs
+- See relevant ADRs in `docs/adr/`
+
+## Implementation Notes
+- TODO: Add implementation notes
+
+## Testing
+```bash
+# TODO: Add test commands
+go test ./...
+```
+