Implement RPC authentication

[D-Stacks]

I would like to transfer the following issue to the rusty-kaspa repo:

Currently, many nodes have RPC ports potentially open to the world
Some manner of authentication should be implemented to mitigate it

Suggested solution: gRPC supports authentication out-of-the-box: https://grpc.io/docs/guides/auth/

Source: kaspanet/kaspad#1893

Only the auth method should probably ideally support wRPC, gRPC and all potential future protocols in a generic manner.

[D-Stacks]

As per the original issue; it is preferable if the auth of a connection can be handled on a per call / notfification basis.

[KaffinPX]

It should be handled by proxies, reference sofwares should be simple as much as possible i think

[RoboticWF]

Starting to figure this out now