[WIP] Java base project for Flink 2
This MR aims to create a Java folder with the basics for a project with Java 25 and Flink 2. There is a single, (almost) empty class with a simple test, just to run tests.
The parent pom with a Java 25 profile is still pending to be created .
I was considering whether to create a main pom.xml with a subfolder for this initial pipeline or have it on a single pom.xml for now. The MR contains the latter, a single project for now, I believe we can iterate over it when we need to implement more pipelines, moving it to a subfolder shouldn't be an issue later.
Edited by JavierMonton