feat: add Visual change with grouped replacement undo

src/ruby_host.rb

@@ -28,7 +28,7 @@ module Vamp
       normal newline backspace submit
       search search_next search_previous
       word_next word_previous word_end big_word_next big_word_previous big_word_end
-      select copy cut paste_before paste_after
+      select copy cut change paste_before paste_after
     ].each do |name|
       action = Action.new("core.#{name}".freeze).freeze
       define_singleton_method(name) { action }