fix(types,client,server): improve type safety and harden client/server message handling

ts/interfaces/socketfunctionrequests.ts

@@ -15,6 +15,12 @@ export interface ISocketRequest_ProcessMessage {
   method: 'processMessage';
   request: interfaces.IUniverseMessage;
   response: {
-    messageStatus: 'ok' | 'channel not found';
+    messageStatus: 'ok' | 'channel not found' | 'authentication required';
   };
 }
+
+export interface ISocketRequest_Unsubscribe {
+  method: 'unsubscribe';
+  request: interfaces.IServerUnsubscribeActionPayload;
+  response: {};
+}

ts/interfaces/universemessage.interfaces.ts

@@ -1,12 +1,12 @@
-export interface IMessageCreator {
+export interface IMessageCreator<T = any> {
   messageText: string;
-  payload?: string | number | any;
+  payload?: T;
 }
 
 /**
  * A universe
  */
-export interface IUniverseMessage extends IMessageCreator {
+export interface IUniverseMessage<T = any> extends IMessageCreator<T> {
   id: string;
   /**
    * time of creation