Juergen Kunz c2f2f1e2ee feat(update): add version check to skip update when already latest ...

Now `nupst update` checks current version against latest release before
downloading anything.

Behavior:
- Fetches latest version from Gitea API
- Compares with current version
- Shows "Already up to date!" if versions match
- Only downloads/installs if newer version available

Example output when up to date:
  Checking for updates...
  Current version: v4.0.8
  Latest version:  v4.0.8

  ✓ Already up to date!

2025-10-19 22:50:03 +00:00

..

group-handler.ts

style: configure deno fmt to use single quotes

2025-10-19 13:14:18 +00:00

service-handler.ts

feat(update): add version check to skip update when already latest

2025-10-19 22:50:03 +00:00

ups-handler.ts

fix(lint): remove unnecessary async keywords from synchronous functions

2025-10-19 13:25:01 +00:00