Add Uranium to Vulcanus.

🚀 PROJECT CORE
Mod Name: vulcanus-uranium (v21.0.1)
Target Engine: Factorio 2.1 (Space Age + Any Planet Start compatibility)
Goal: Procedurally inject natural, independent uranium ore patches strictly into the planet Vulcanus.
Details: The resource generation tab at the beginning of a new game correctly displays a new, separate-from-Nauvis slider with all three controls.

Written from scratch using guidance and suggestions from Gemini 1.5 Pro.

To be included in a future mod-pack project, "2.1 uplift project".