P-Y on Nostr: It's now easy to add factories... but we would also very much like to make it easy to ...

It's now easy to add factories... but we would also very much like to make it easy to get instances from our Toot based Dependency Injection Framework

Let's add a `get()` method to pull a factory and then invoke that lambda factory:

```
inline fun <reified T> Linker.get(): T {
return factories.getValue(T::class.java)() as T
}
```