Rewrite Weird DNS Server in Rust

[zicklag]

Right now our Weird DNS server is built into the Weird server, but for something so fundamental and important to the availability of the app and more, I think we should rewrite it in Rust and deploy as a microservice.

The DNS server gets all of it's info from Redis and that can remain unchanged.

The current DNS server is here in $lib/dns/server.ts.

For the Rust implementation we want to use the hickory-server library.