As I answered to several other comments, this is not a helpful suggestion when most typographers suggest to use bold for emphasis of sans-serif fonts, as italic with sans-serif is less noticeable than 𝗯𝗼𝗹𝗱.

But I want to have the typesetting ability to provide emphasis, distinction, quotes, like in a book.

If I can’t get TeX or markdown, at least proper emphasis should be supported.