Finished adding the "Creeping Doubt" plant block.

Still need to do some more work, such as adding the seeds and the material you get from the plant.

src/generated/resources/assets/bloodmagic/models/item/creeping_doubt.json

@@ -0,0 +1,6 @@
+{
+  "parent": "minecraft:block/crop",
+  "textures": {
+    "crop": "bloodmagic:block/creeping_doubt_8"
+  }
+}