Add automated input for TAS/testing

[JMcKiern]

[i-am-wololo]

Lol.

I mean, you can make a script yourself for automating input events...

[JMcKiern]

Yup, the idea is to have a file with a bunch of controller actions that the emulator performs and then get the screen output to see if it matches what's expected.

It would allow for much more extensive tests