add creature and base rp_world

db/migrate/20210602152828_create_rp_worlds.rb

@@ -0,0 +1,11 @@
+class CreateRpWorlds < ActiveRecord::Migration[6.1]
+  def change
+    create_table :rp_worlds do |t|
+      t.string :name
+      t.string :description
+      t.belongs_to :user
+
+      t.timestamps
+    end
+  end
+end