deskutils/projectlibre: Update 1.9.3 => 1.9.8, take maitainership

Changelog:

• Java and Libraries updates
• Code using deprecated apis updated
• Performance fixes
• Toolbar fixes
• New builds using jpackage supporting Java 21 and ARM architecture.

https://sourceforge.net/p/projectlibre/code/ci/0530be227f4a10c5545cce8d3db20ac5a4d76a66/

Improve port:

• Update WWW.
• Add LICENSE_FILE.
• Set minimal Java version - require 21+.
• Improve start script.