feat(editor): add date grouping configurations (#12679)

https://github.com/user-attachments/assets/d5578060-2c8c-47a5-ba65-ef2e9430518b

This PR adds the ability to group-by date with configuration which an
example is shown in the image below:


![image](https://github.com/user-attachments/assets/8762342a-999e-444e-afa2-5cfbf7e24907)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Date-based grouping modes (relative, day, week Sun/Mon, month, year),
a date group renderer, and quick lookup for group-by configs by name.

* **Improvements**
* Enhanced group settings: date sub‑modes, week‑start, per‑group
visibility, Hide All/Show All, date sort order, improved drag/drop and
reorder.
* Consistent popup placement/middleware, nested popup positioning,
per‑item close-on-select, and enforced minimum menu heights.
* UI: empty groups now display "No <property>"; views defensively handle
null/hidden groups.

* **Tests**
  * Added unit tests for date-key sorting and comparison.

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settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Norkz <richardlora557@gmail.com>
Co-authored-by: graphite-app[bot] <96075541+graphite-app[bot]@users.noreply.github.com>

packages/frontend/core/src/desktop/dialogs/import/index.tsx

@@ -1,5 +1,4 @@
-import { Button, IconButton, Modal } from '@affine/component';
-import { IconType } from '@affine/component';
+import { Button, IconButton, IconType, Modal } from '@affine/component';
 import { getStoreManager } from '@affine/core/blocksuite/manager/store';
 import { useAsyncCallback } from '@affine/core/components/hooks/affine-async-hooks';
 import { useNavigateHelper } from '@affine/core/components/hooks/use-navigate-helper';