compat: Environmental colored wisteria leaves

- Uses a new per-texture configuration system that allows customizing block states
- This system also allows defining the texture stitching layout, based on the following template:
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input/assets/environmental/textures/block/pink_wisteria_leaves.betterleaves.json

@@ -0,0 +1,5 @@
+{
+    "blockStateData": {
+        "state": "half=bottom"
+    }
+}