Function parse_rich_html_inline 

pub fn parse_rich_html_inline(html: &str) -> RichText

Parse an HTML inline string into a RichText tree. Handles all inline tags: b, strong, i, em, u, ins, s, del, strike, code, mark, tg-spoiler, sub, sup, a, tg-emoji, tg-time, tg-math, tg-reference.