unicode-consts: all characters as named `&str` constants

Maybe most people have rofi or some picker set up so they can search for and type any unicode character they want, but it thought it seemed cool to be able to access them via named Rust constants instead.

I have no clue how bad of an idea this is. The source code is 82304 lines and 3.5MiB in size.

EDIT: the docs.rs page: https://docs.rs/unicode-consts