Updated samples and demo app to use GroupDocs.Comparison for Java v23.10

Fixed Dropwizard dockerfile

Minor fix

Updated to be compiled with Java 8

Updated Compose, Javalin, Ktor and Micronaut samples to use GroupDocs…

….Comparison for Java v22.11

Moved settings file to user.home directory

Merge pull request #14 from atirtahirgroupdocs/master

Readme file and added in showcases