set up example scaffold with rspec + factorybot tests

db/migrate/20231223040511_create_dashboard_examples.rb

@@ -0,0 +1,10 @@
+class CreateDashboardExamples < ActiveRecord::Migration[7.1]
+  def change
+    create_table :dashboard_examples do |t|
+      t.string :text
+      t.text :body
+
+      t.timestamps
+    end
+  end
+end