feat(editor): streamline cell editing and navigation with improved keyboard support (#12770)

https://github.com/user-attachments/assets/6bce5fa3-fb25-4906-bef1-50d4da4a13f6

This PR addresses #12769 and improves table editing UX by making Enter
commit changes and move focus down, and Tab/Shift+Tab move focus
horizontally—matching spreadsheet-like behavior.

Typing now immediately enters edit mode for selected cells without
double-clicking.
These updates apply to both the standard and virtual table views.

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

- **New Features**
- You can now start editing a table cell by simply typing any character
while the cell is selected.
- **Improvements**
- Pressing Enter while editing a cell will exit editing and move focus
down.
- Pressing Tab or Shift-Tab while editing a cell will exit editing and
move focus right or left, respectively.
- **Tests**
- Added unit tests for table cell hotkey behaviors to ensure reliable
editing and navigation.
- **Chores**
- Introduced Vitest configuration for streamlined testing and coverage
reporting.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: L-Sun <zover.v@gmail.com>

blocksuite/affine/data-view/package.json

@@ -28,6 +28,7 @@
     "lit": "^3.2.0",
     "lodash-es": "^4.17.21",
     "rxjs": "^7.8.1",
+    "vitest": "^3.2.3",
     "yjs": "^13.6.21",
     "zod": "^3.23.8"
   },