add WowGuild model

app/models/wow_guild.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+class WowGuild < ApplicationRecord
+  extend Mobility
+  translates :translated_faction
+
+  belongs_to :wow_realm
+  has_many :wow_characters, dependent: :nullify
+
+  validates :name, presence: true
+  validates :guild_id, presence: true, uniqueness: true
+end