UrdaVarg Energy 0.1.67-dev1-oil-merged

Test merge based on:
- UrdaVarg Energy 0.1.66a-roadworks-display
- UrdaVarg Energy Tier 1b dev19-storagebox-tank

The oil feature classes and resources are bundled into the same JAR and loaded as additional entrypoints of urdavarg_energy.
The existing urdavarg_tier1b registry namespace is preserved in this test build to avoid changing saved IDs and proven code before in-game validation.
Do not install the old separate Tier 1b JAR together with this merged build.
