Add static type information to exported resources

#### Problem

I use the following `.wit` to describe a WASM component which provides a long living _operator_ that is initialized once and then invoked multiple times to perform some operation:
````wit
world example {
export exports: interface {
resource operator {
init: static func(...) -> operator;
run: func(...) -> ...;
}
}
}
````

Using this component from a `wasmtime` host is somewhat unergonomic, because calling `call_init`
returns a `ResourceAny` instance, which doesn't carry any (static) type information.
Calling methods on this resource is thus very verbose (see below), and there is a risk of mixing up resources of different types.
````rust
let resource = component.exports().operator().call_init(&mut store, ...)
component.exports().operator().call_run(&mut store, resource, ...)
````

#### Feature

Ideally, the rust-representation of the resource returned from a WASM component would contain sufficient type information to allow its (and only its) methods to be called with standard method syntax.

#### Benefit

Better ergonomics when working with resources (reduced error potential, less verbose syntax).

#### Implementation

It feels like this should not be too complicated, but maybe I'm missing something and what I'm suggesting isn't actually possible.