Closes: BS-3396
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced structured and validated configuration options for database and linked document views, allowing for more flexible and reliable customization.
- Enhanced view manager to conditionally enable AI-related paragraph placeholders and database/linked document extensions based on configuration.
- **Chores**
- Updated dependencies to include the latest version of the Zod validation library.
- Simplified and consolidated internal configuration and registration logic for AI and widget-related extensions.
- **Refactor**
- Streamlined configuration types and removed unused or redundant configuration utilities to improve maintainability.
- Improved robustness of linked widget configuration retrieval to handle optional service availability gracefully.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
