Build up an epub file from text file somewhat nicely

Hey there,

I've transcribed an audiobook with whisper and the end result is a huge wall of text with no indication about paragraphs, if a word should be bold/italic and aside from some general punctuations, you can't really tell how it should look like.

So my question is, without a ton of manual work, is there a way to turn this wall of text into a nice looking epub from scratch? I was thinking maybe a script or some automation of sort.

Thank you.