Refactor and update types and handlers

- README changes: removed 'as const' annotation and note.
- Connector changes: dispatched event for commands in gateway.
- Updated processor type guard for command handlers.
- Removed readonly from CommandHandler types in handler definitions.
- Test adjustments: updated demo tests to reliable command registration.

src/services/connectors/gateway.ts

@@ -204,14 +204,16 @@ export class Gateway {
             this.client.messages.set(message.id, message);
             // Generate context
             const context = new Context(this.client, this.api, { message });
+            // Dispatch event for the command
+            this.bus.emit(`command:${command}`, context, args);
             // // Check if command exists
-            if (this.processor[HandlerType.ChatCommands].has(command)) {
-                // Execute the handler
-                this.processor[HandlerType.ChatCommands].execute(command, context, args);
-            } else {
-                // TODO: Custom unknown command handler
-                context.reply(`Unknown command: ${command}`);
-            }
+            // if (this.processor[HandlerType.ChatCommands].has(command)) {
+            //     // Execute the handler
+            //     this.processor[HandlerType.ChatCommands].execute(command, context, args);
+            // } else {
+            //     // TODO: Custom unknown command handler
+            //     context.reply(`Unknown command: ${command}`);
+            // }
         }
     };