Refactor message registration and validation

Split up the action of registring an event or request data class to be
decoded by the Link class and the action of registring a handler for
those requests and events.  This moves the validation work from Link
instantiation time to startup initialisation which makes logic errors
fail on startup instead of failing instantiation of the link when a
connection attempt is made.

Additionally implement a partial validation logic for messages received
using the newly refactored message registration.  This unfortunately
ended up merged with the registration refactor.

packages/controller/src/BaseConnection.js

@@ -19,13 +19,13 @@ class BaseConnection extends libLink.Link {
 		super(connector);
 		this.router = new ControllerRouter(controller);
 		this._controller = controller;
-		for (let [Request, handler] of controller._registeredRequests) { this.register(Request, handler); }
+		for (let [Request, handler] of controller._registeredRequests) { this.handle(Request, handler); }
 		for (let [Request, handler] of controller._fallbackedRequests) { this.fallbackRequest(Request, handler); }
-		for (let [Event, handler] of controller._registeredEvents) { this.register(Event, handler); }
+		for (let [Event, handler] of controller._registeredEvents) { this.handle(Event, handler); }
 		for (let [Event, handler] of controller._snoopedEvents) { this.snoopEvent(Event, handler); }
 
-		this.register(libData.ModPackGetRequest, this.handleModPackGetRequest.bind(this));
-		this.register(libData.ModPackGetDefaultRequest, this.handleModPackGetDefaultRequest.bind(this));
+		this.handle(libData.ModPackGetRequest, this.handleModPackGetRequest.bind(this));
+		this.handle(libData.ModPackGetDefaultRequest, this.handleModPackGetDefaultRequest.bind(this));
 	}
 
 	async disconnect(code, reason) {