addon SDK based on the types crate

[Ivshti]

an addon SDK that's based on the types crate from this repo

it can use proc macro to allow compile time validation of certain constraints: e.g. a manifest that mentions meta resource means you always have to implement a handler, or vice versa (if you implement a handler you need to put it in the manifest)

while under the hood it'd be best to use hyper (cause, performance), the API should be similar to Rocket:
https://github.com/SergioBenitez/Rocket
https://rocket.rs/
https://www.youtube.com/watch?v=t_FUZ34ahBE

Something else which is super useful in Rocket is the error messages at compile time: it can even detect routing conflicts

[Ivshti]

closing in favor of #30 ; a full SDK might not be needed, just basic routing