add a way to ignore lines from being formatted

[zignis]

Thanks for this tool! What I'm looking is something similar to --sqlformat-ignore cooment that ignores the next line. I'm trying to have a column named as "password", but it is being converted into uppercase:

https://github.com/shssoichiro/sqlformat-rs/blob/199715a7e4f531ee17ae15cd1c354aafab8d223b/src/tokenizer.rs#L736