Add help system, deployment docs, and improve setup

Introduces a new interactive help command with button navigation, adds a detailed DEPLOYMENT.md guide, and improves server setup validation and error handling. Updates command registration to include all 9 games, adds version reporting, enhances Docker deployment with a multi-platform script, and removes local .env files from the repo. Also refactors bot startup for better diagnostics and graceful shutdown.

src/services/NotificationService.js

@@ -23,6 +23,15 @@ class NotificationService {
                     console.log(`Notification service listening on port ${port}`);
                     resolve();
                 });
+                
+                this.server.on('error', (error) => {
+                    if (error.code === 'EADDRINUSE') {
+                        console.log(`Port ${port} is in use, trying port ${port + 1}`);
+                        this.start(port + 1).then(resolve).catch(reject);
+                    } else {
+                        reject(error);
+                    }
+                });
             } catch (error) {
                 reject(error);
             }