Add Table format to Cell data view sidebar

Adds a new "Table" format option to the Cell data view widget that
displays the selected row as a vertical list with column names above
values, inspired by TablePlus.

Features:
- Shows all columns from the selected row in grid display order
- Inline editing support for regular values (double-click to edit)
- JSON values open Edit Cell modal on double-click
- Open-in-new button for JSON values to view in JSON tab

packages/web/src/widgets/CellDataWidget.svelte

@@ -14,6 +14,12 @@
       component: TextCellViewNoWrap,
       single: false,
     },
+    {
+      type: 'table',
+      title: 'Table',
+      component: TableCellView,
+      single: false,
+    },
     {
       type: 'json',
       title: 'Json',
@@ -92,6 +98,7 @@
   import JsonRowView from '../celldata/JsonRowView.svelte';
   import MapCellView from '../celldata/MapCellView.svelte';
   import PictureCellView from '../celldata/PictureCellView.svelte';
+  import TableCellView from '../celldata/TableCellView.svelte';
   import TextCellViewNoWrap from '../celldata/TextCellViewNoWrap.svelte';
   import TextCellViewWrap from '../celldata/TextCellViewWrap.svelte';
   import ErrorInfo from '../elements/ErrorInfo.svelte';