Added dimension takeover

- IrisDimension borrowedDimensionType reuses an existing registered dimension type instead of generating one
- Pack validation rejects borrowedDimensionType values that are not namespaced registry keys
- Generation contracts record the borrowed type key and capture it as an external registry definition
- Borrowed types bind when the pack min equals the type min_y and the pack top fits, with both ranges in the refusal
- Studio hotload rejects borrowed type changes and the world check validates borrowed ranges
- Forced datapack skips generated types and presets for borrowed dimensions and accepts retained borrowed epochs
- modded.json dimensionTakeovers writes a LevelStem per level key using the irisworldgen:iris generator
- Takeover changes quarantine the level chunk, entity, POI, and Iris data before load and track applied state per world
- Fresh levels adopt generation history with content-addressed biomes instead of legacy aliases
- /iris world takeover <dimension> <pack[:dimension]|off> with help and translations in every locale

adapters/bukkit/plugin/src/main/java/art/arcane/iris/world/IrisWorldGeneratorResolver.java

@@ -896,14 +896,10 @@ public final class IrisWorldGeneratorResolver {
     }
 
     private static String dimensionTypeKey(IrisData data, IrisDimension dimension) {
-        return IrisPlatforms.get()
-                .registries()
-                .generationRegistry()
-                .dimensionTypeResourceKey(
-                        data.getDataFolder().getName(),
-                        dimension.getLoadKey(),
-                        dimension.getDimensionTypeKey()
-                );
+        return dimension.dimensionTypeResourceKey(
+                IrisPlatforms.get().registries().generationRegistry(),
+                data.getDataFolder().getName()
+        );
     }
 
     private record LoadedHistory(GenerationHistory history, File activePack) {