feat: rebuild board grid experience

packages/db/migrations/sqlite/0042_add_layout_gutters.sql

@@ -0,0 +1,2 @@
+ALTER TABLE `layout` ADD `left_gutter_column_count` integer DEFAULT 0 NOT NULL;--> statement-breakpoint
+ALTER TABLE `layout` ADD `right_gutter_column_count` integer DEFAULT 0 NOT NULL;

packages/db/migrations/sqlite/meta/_journal.json

@@ -302,6 +302,13 @@
       "when": 1784305283910,
       "tag": "0042_custom_widget_v2_tables",
       "breakpoints": true
+    },
+    {
+      "idx": 43,
+      "version": "6",
+      "when": 1786212459480,
+      "tag": "0043_add_layout_gutters",
+      "breakpoints": true
     }
   ]
 }