feat(embedding): Implement smart embedding configuration and service

- Introduce EmbeddingConfigurationManager for managing embedding settings.
- Add EmbeddingPhaseFactory for creating embedding phases with dependency injection.
- Implement EmbeddingService for handling file embedding operations.
- Create FileService to abstract file system operations.
- Implement VectorDbSyncService for synchronizing vector database with file system changes.

Author: olasunkanmi-SE