feat(core): Centralize timeouts/constants, add CLI prompt helpers, and introduce webhook/script actions with safety and SNMP refactors

ts/nupst.ts

@@ -9,12 +9,13 @@ import { ServiceHandler } from './cli/service-handler.ts';
 import { ActionHandler } from './cli/action-handler.ts';
 import { FeatureHandler } from './cli/feature-handler.ts';
 import * as https from 'node:https';
+import type { INupstAccessor, IUpdateStatus } from './interfaces/index.ts';
 
 /**
  * Main Nupst class that coordinates all components
  * Acts as a facade to access SNMP, Daemon, and Systemd functionality
  */
-export class Nupst {
+export class Nupst implements INupstAccessor {
   private readonly snmp: NupstSnmp;
   private readonly daemon: NupstDaemon;
   private readonly systemd: NupstSystemd;
@@ -134,11 +135,7 @@ export class Nupst {
    * Get update status information
    * @returns Object with update status information
    */
-  public getUpdateStatus(): {
-    currentVersion: string;
-    latestVersion: string;
-    updateAvailable: boolean;
-  } {
+  public getUpdateStatus(): IUpdateStatus {
     return {
       currentVersion: this.getVersion(),
       latestVersion: this.latestVersion || this.getVersion(),