Update feature - RepairShopr/AutoPrintr-win GitHub Wiki

When AutoPrintr is running - it check updates from GitHub API and if new release is available suggest it to user.

Update logic:

1. Get latest update description from GitHub API: https://api.github.com/repos/RepairShopr/AutoPrintr-win/releases/latest
2. Check release version
3. If version is newer and release contains zip archive - suggest user to update programm
4. Download zip from release
5. Unpack zip
6. Check if zip contains file version.txt and installer
7. Run installer