Universal GitHub Release Checker and Updater (with check-only and check+update modes)

[Zoriot]

Background:
Previous logic for the Updater and the Dependency Checker (including soft dependency initialization) was removed due to reliance on the legacy Spigot site and unnecessary/poor logic. See these refactor/removal commits for context:

• Plot-System: fd3a8a5a73625a66aa87c71a440ccb1cffad0679
• Plot-System: 2712746961756e440e1935f3c1047228aa92caca
• Plot-System: 6160df7559e90056e13568fd630caff5dca260cb
• Plot-System-Terra: 41b584a4d0e62dc17046fe8fda95186fc9f93a48
• Plot-System-Terra: b44cd4743eaf5371f141f4b51c7d879de6f3a07d

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Feature Request:
Create a universal GitHub Release Checker and Updater for Alps-Lib, which can be used across all projects. The tool should support two modes:

• Check-only: Verifies if a new release is available but does not perform any update.
• Check + Update: Checks for a new release and updates to the latest version if available.

The implementation should be able to provide the updated revision information (revs) after checking/updating.

For reference implementation, see:

• Osiris-Team/AutoPlug-Client GithubReleaseUpdater.java

This will improve maintainability, reliability, and updatability for all AlpsBTE projects.