Add Linker and Optimizer modules with API integration and frontend components

- Added Linker and Optimizer apps to `INSTALLED_APPS` in `settings.py`.
- Configured API endpoints for Linker and Optimizer in `urls.py`.
- Implemented `OptimizeContentFunction` for content optimization in the AI module.
- Created prompts for content optimization and site structure generation.
- Updated `OptimizerService` to utilize the new AI function for content optimization.
- Developed frontend components including dashboards and content lists for Linker and Optimizer.
- Integrated new routes and sidebar navigation for Linker and Optimizer in the frontend.
- Enhanced content management with source and sync status filters in the Writer module.
- Comprehensive test coverage added for new features and components.

backend/igny8_core/ai/registry.py

@@ -99,10 +99,16 @@ def _load_generate_site_structure():
     from igny8_core.ai.functions.generate_site_structure import GenerateSiteStructureFunction
     return GenerateSiteStructureFunction
 
+def _load_optimize_content():
+    """Lazy loader for optimize_content function"""
+    from igny8_core.ai.functions.optimize_content import OptimizeContentFunction
+    return OptimizeContentFunction
+
 register_lazy_function('auto_cluster', _load_auto_cluster)
 register_lazy_function('generate_ideas', _load_generate_ideas)
 register_lazy_function('generate_content', _load_generate_content)
 register_lazy_function('generate_images', _load_generate_images)
 register_lazy_function('generate_image_prompts', _load_generate_image_prompts)
 register_lazy_function('generate_site_structure', _load_generate_site_structure)
+register_lazy_function('optimize_content', _load_optimize_content)