Handle denote name scheme.

Core of this crate is the Denote struct. Create it, fill in the fields as an option and convert it in to string to get formatted string in denote name scheme.

Example

use zeroten_denote::{Denote, Identifier, Signature, Extension, Title};

// You can use something like `Identifier::now()` but for example, we will take an already
// formatted identifier
let identifier = Identifier::parse("20240912T13015412").unwrap();
let denote = Denote::new(identifier)
    .title(Title::parse("Some title").unwrap())
    .signature(Signature::parse("1b").unwrap())
    .extension(Extension::new("txt").unwrap())
    .to_string();
assert_eq!(denote.to_string(), "20240912T13015412==1b--some-title.txt");