MRPF Scanner API

This is a websockets interface to the different scanners built on top of the MRPF network engine. It can be run on any machine that has Rust, at the moment focussed on running it on my mabook itself, but I can see it being useful to run on a VM in the cloud. It would be good if we can somehow get the VM being part of the workers of our task manager as these things have some overlap. The MRPF Scanner API should be only a frontend for the scanners, not do any scanning itself to keep separation of concerns.

Running websockets on any server is great as we can have bare-metal workers this way (or for instance my macbook). What would also be nice though is to actually use AWS Lambda for certain tasks here as well. We could leverage AWS WebSocket API Gateway with a lambda backing. Apparently all the keepalive stuff is handled by API gateway, you only pay for real messages and the lambda execution time.