I'm not sure that I understand your request, so I would like to ask you some questions.
Are you looking for a way to rotate individual characters or are you looking to rotate a block of text? Do you realize that you can type a letter or word and use CMD/CNTRL+T to transform and/or rotate it? What more are you looking for? How would customers use the feature you're requesting? What common, real-world problem would it solve?
Also, keep in mind, for contextual languages, such as Arabic, Persian, and Hindi, rotating individual characters isn't possible or valid.