pyprconf: templated configuration and event handling

[trippwill]

I could refactor forever, but decided it's time to get some other eyes on this.

[vaxerski]

no clue wtf this is but pretty cool :+1:

I'll let fuffie handle this :^)

[fufexan]

Honestly no idea how to review this, I don't know nearly enough python. But if it works for you, I'd say it's good to go.

I'll try to find a python linter to add to the CI. Or perhaps you're aware of some testing tool that we could add?