Routing Middleware

**Enhancement**

A routing middleware that can be used to:

* conditionally render content based on the an outlet
* create links
* determine whether an outlet is active
* provide path and query params.

Possible example usage for routing middleware:

```tsx
const factory = create({ routing });

const MyWidget = factory(function MyWidget({ middleware: { routing } }) {
let node: any = undefined;
if (routing.isExact("home")) {
return

;
}
if (routing.isMatch("details")) {
const { params, queryParams } = routing.getParams("details");
return (

);
}
if (routing.isMatch("about")) {
return ;
}
return null;
});
```

The middleware could be a factory to that accepts routing configuration to be registered, falling back to using a router defined as an injector, this would provide backwards compatibility with applications that are using class-based widgets.

Additional consideration(s):

* [ ] Support for route based code splitting