add tokenator crate

also remove a lot of the "advanced" token parsing style
which was a bit too verbose for my tastes

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_columns/src/storage/decks.rs

@@ -18,6 +18,7 @@ use crate::{
 };
 
 use notedeck::{storage, DataPath, DataPathType, Directory};
+use tokenator::{ParseError, TokenParser, TokenSerializable, TokenWriter};
 
 pub static DECKS_CACHE_FILE: &str = "decks_cache.json";