[FR] Relation property improvements

## Feature Request Overview

### Key Features to Implement

1. **Filtering of Relation Properties**
Enable users to filter relation properties for better data management and organization.

2. **Date Filtering**
Currently, there is no option to filter dates. Adding this feature would enhance usability.

3. **Template Functionality**
Introduce a template feature that allows the inclusion of relation properties. When a new page is created using the template, the relation should automatically update to reference the newly created page instead of the template itself.

**Example Context:**
- Consider two databases: **'Area'** and **'Resource'**.
- If I create an item named **'Health'** in the **'Area'** database and link it to a grid of **Resource** filtered by (Area is Health), the template named **'AreaTemplate'** should adjust the filter in newly created pages to reflect the name of the new page instead of the template name.


### Community Appreciation

I genuinely appreciate this project, especially because it is open-source and fosters a supportive community. Unlike larger corporations, I feel empowered to share my requests and opinions here. I kindly ask for the implementation of these features, as they would significantly enhance my workflow. Currently, I have achieved about 90% of what I had on Notion, and I am using Appflowy as my all-in-one application for tasks, notes, and projects. It truly is the best app in my opinion!

## Expected Impact

Implementing these features will:
- Facilitate quicker file creation.
- Enable more complex setups, enhancing overall user experience.

### Closing Note

I hope my feedback resonates with you, and I appreciate your consideration of these requests! Thank you! 😊