Is there a term for words filling in for body language (*sigh*) and/or for typography being used to express tone or intonation (THIS IS SHOUTING)?
To me, these are like interjected stage directions but there are a couple words people use to describe embedding actions or emotions in text.
When in the first person, they are typically called "emotes". Elsewhere, they are more likely to be called "inflectives". Perhaps there is a better word that can capture the more kinesic meaning a sentence can be given.