* Updated all package versions including kotlin. Updated all web-server tests to run.

* Changed the java version of the tests. OpenDC now only supports java 19.

* small update

* test update

* new update

* updated docker version to 19

* updated docker version to 19

This change removes the unnecessary service classes where they are only
used to forward data from the resource to the entities. Furthermore,
DTOs are now moved from the service layer to the resources.

This change updates the Quarkus-based web server with a new endpoint for
querying data about the active user including accounting data.

This change updates the Quarkus-based web server to add support for
tracking and limiting the simulation minutes used by the user in order
to prevent misuse of shared resources.

This change updates the build configuration to use Spotless for code
formating of both Kotlin and Java.

This change updates the repository to remove the use of wildcard imports
everywhere. Wildcard imports are not allowed by default by Ktlint as
well as Google's Java style guide.

This change adds a unified communication protocol in form of the module
opendc-web-proto which contains the classes that form the communication
protocol of OpenDC's API v2.

By having the protocol in a separate module, we can utilize the classes
in both server and client.