Release 2.5.0

[kelson42]

• Secure nee libkiwix/libzim API is made available to java/kotlin world
• Secure the CI is green on git main
• Update the Changelog
• Check if this new release use latest version of libkiwix and libzim
• Update version
• Close current milestone and create new one incrementaly (a priori a minor version)
• Create a tag on git
• Secure new version is published on Maven Central
• Update the Github release with the Changelog
• Create new empty entry in Changelog (placeholder for future entries)