PoC for GraalVM migration

[hohwille]

For epic #1090 we want to start with a PoC. @ahmedagdmoun will do this with at least the following aspects:

• Java infrastructure for CLI parsing (search for a GraalVM compatible CLI libarary)
• Design infrastructure (interface and abstract base classes) for commandlets. This includes ability to configure (parse devon.properties as currently done by devonfw-ide bash scripts environment-project and functions-core), download tools and "install" it to the software folder, determine the currently installed version.
• Implement at least one commandlet (e.g. java) in Java using that infrastructure
• Add ability to compute the desired environment variables and output them for a shell script world
• Compile this code with GraalVM as native image (automated via maven)
• Create a replacement for devon bash script that runs the native image and can set the environment variables (PATH, etc.) and execute commandlets.

[hohwille]

Was done perfectly by @ahmedagdmoun in his bachelor thesis.
Thanks again for your great work 👍