fix(custom-widgets): refine v2 authoring

packages/db/migrations/sqlite/0041_custom_widget_v2_reset.sql

@@ -10,8 +10,6 @@ CREATE TABLE `custom_widget_definition` (
 	`requests` text NOT NULL,
 	`options_schema` text NOT NULL,
 	`default_options` text NOT NULL,
-	`state_schema` text,
-	`default_state` text,
 	`template` text NOT NULL,
 	`enabled` integer DEFAULT true NOT NULL,
 	`created_at` integer DEFAULT (unixepoch()) NOT NULL,

packages/db/migrations/sqlite/meta/0041_snapshot.json

@@ -574,20 +574,6 @@
           "notNull": true,
           "autoincrement": false
         },
-        "state_schema": {
-          "name": "state_schema",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "default_state": {
-          "name": "default_state",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
         "template": {
           "name": "template",
           "type": "text",