Add register by uuid

[MitchellMarinoDev]

We need a way to order NetMsg's, so that we can give them all an incrementing integer associated with that NetMsg. Right now users can do this by:

1. Registering them in a constant order
2. Registering them with a unique string

We should add a way that relies on them having a uuid using type_uuid.
This could just work by getting the uuid as a string and using the "unique string" method internally