feat: add before hook

installer.rb

@@ -42,7 +42,7 @@ module RimeDeploy
       code = <<-CODE
   class #{os_prefix}JobGroup < JobGroup
   end
-  mod = #{os_prefix}JobGroup.new(#{os_prefix}::Jobs, #{os_prefix}::FinishedHook)
+  mod = #{os_prefix}JobGroup.new(#{os_prefix}::BeforeHook, #{os_prefix}::Jobs, #{os_prefix}::FinishedHook)
   mod.call
 
 CODE