Integrate Vehicle Model Generation and kuksa-java-sdk

[wba2hi]

Contains two bugfixes which were required for Java:
vss-processor-plugin -> VssProcessorPlugin.kt => use JavaCompile instead of preCompile (the later is an android specific gradle task)
vss-processor -> VssNodeSpecModel.kt => Change equals and hashCode method to use the path instead of the uuid. The uuid is not part of all (especially BYD-specific) VSS Specs. However the (absolute) path itself should be a sufficient id, because it will not contain two nodes which are named "Vehicle.Speed" or comparably.

[wba2hi]

Moved all kuksa.val.v2 related stuff to kuksa-java-sdk, so this PR needs to be merged first: eclipse-kuksa/kuksa-java-sdk#8

[Chrylo]

Could we add a run config(s) for the tests? :)

[Chrylo]

https://www.conventionalcommits.org/en/v1.0.0/ is used but the tooling is not there yet. It is fine if this is done at a later point. However two commits here are not consistent in the history.

[wba2hi]

Functional Tests are still failing, now however with a different error message, which doesn't make sense:

* What went wrong:
A problem occurred configuring project ':lib'.
> Extension of type '**LibraryExtension**' does not exist. Currently registered extension types: [ExtraPropertiesExtension, LibrariesForLibs, VersionCatalogsExtension, BasePluginExtension, DefaultArtifactPublicationSet, SourceSetContainer, ReportingExtension, JavaToolchainService, JavaPluginExtension, **LibraryExtension**, LibraryAndroidComponentsExtension, NamedDomainObjectContainer<BaseVariantOutput>, VssProcessorPluginExtension]

I tried the following things:

• add more kotlin / android related libraries as dependencies
• add the libs from above to the buildSrc directory
• executing the functionalTest project manually which interestingly worked but lead to a lot of uncleaned gradle .lock files which made issues on consecutive runs and had to be removed manually
• using different packages for AppExtension and LibraryExtension

Only solution I saw was to add more sample projects for the different projects (e.g. android-app, android-lib, java-app, java-lib) and add the plugin in there.

[Chrylo]

LGTM

[MP91]

LGTM (looks good to Mark)