feat(status): display version and update status in nupst status command

- Add version display at the top of status output
- Check for available updates and notify user
- Show "Up to date" or "Update available" with version
- Display before service and UPS status information
- Improves user awareness of software version and updates

Bumps version to 4.1.4

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@serve.zone/nupst",
-  "version": "4.1.3",
+  "version": "4.1.4",
   "exports": "./mod.ts",
   "tasks": {
     "dev": "deno run --allow-all mod.ts",