Component Registry based on Annotations

[edwardwawrzynek]

See: https://docs.google.com/document/d/15Zqb4Qg0hAOexKfWzM0Ix8K-mvfXr7149NzTzXrMUFo/edit#heading=h.dwfw9dyl58jw

Basically allows component argument type declarations to be in the same spot as the component, instead of config file.