One Spatial Dimension (#4570)

* Ported the "one spatial dimension" concept from pre-1.15

* Apply lighting updates after moving chunks.
Mark world data as dirty when changing it.

* Consolidated naming of spatial storage world/dimension.
Use server light manager to update lighting info in chunk.

* Save last transition information,
and add ae2 spatial command to interact with spatial storage.

* Formatting fixes.

* Improved docs for the origin generation.

Inverted condition on when the x/z axis are flipped.
Also added a helper to map a plot to a region file

* Remove TransitionResult since it's only used in lieu of a boolean.
Rework transition to make the checks BEFORE allocating a new cell.

* Removed unused imports.

Co-authored-by: yueh <yueh@users.noreply.github.com>

src/main/java/appeng/mixins/spatial/DimensionOptionMixin.java

@@ -0,0 +1,38 @@
+package appeng.mixins.spatial;
+
+import java.util.List;
+import java.util.Map;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyVariable;
+
+import net.minecraft.util.RegistryKey;
+import net.minecraft.world.Dimension;
+
+import appeng.spatial.SpatialStorageDimensionIds;
+
+/**
+ * This Mixin tries to hide the screen that warns users about experimental
+ * features being used, but only if AE2's dimension is the only added dimension.
+ */
+@Mixin(Dimension.class)
+public class DimensionOptionMixin {
+
+    /**
+     * This injects right after the method makes a local copy of all present
+     * dimensions, and modifies the list by removing our mod-provided dimension from
+     * it.
+     * <p>
+     * This means Vanilla will perform it's check whether it should display an
+     * experimental warning without considering our dimension.
+     */
+    @ModifyVariable(method = "func_236060_a_", at = @At(value = "INVOKE_ASSIGN", ordinal = 0, target = "Lcom/google/common/collect/Lists;newArrayList(Ljava/lang/Iterable;)Ljava/util/ArrayList;", remap = false), allow = 1)
+    private static List<Map.Entry<RegistryKey<Dimension>, Dimension>> overrideExperimentalCheck(
+            List<Map.Entry<RegistryKey<Dimension>, Dimension>> dimensions) {
+        // this only removes our dimension from the check
+        dimensions.removeIf(e -> e.getKey() == SpatialStorageDimensionIds.DIMENSION_ID);
+        return dimensions;
+    }
+
+}