Automatically derive as many traits as possible for KeyCode, and other public structs

[Neurrone]

As per title. Ran into this because I have a Keycode in a struct representing possible input gestures, and was unit testing configuration parsing.

[SiegeLord]

I added some. Keeping this open in case I forgot some.

[Neurrone]

Thanks. I also ran into a situation where I missed being able to hash it.

If you also add automatic derives for hash, it would make sense to derive as many as possible so it would hopefully be the last time you have to do this, as suggested by this page on common traits in the API guidelines.