Suggestion: Implement Parse

[cozyGalvinism]

I think a nice addition would be to allow for parsing of keys via String so:

a will return the a key, ctrl+c will return the c key with CTRL modifier and so on.

[HactarCE]

There's several different formats for writing keybinds:

• ctrl+c (+)
• ctrl-c (-)
• C-c (Emacs)
• ^c (macOS)
• probably some others?

In my original design for this lib, I thought about supporting ser/deser for each of these formats, but decided against it because it's highly application-specific and I didn't need it. I'm curious what would be most useful for your application, and whether it's possible to just serialize a struct with modifiers and a key like I do here.