Add player animation system!

- Hooks into ModelRenderer by wrapping it in an extended version that allows modification of angles after the model has set them
- Is compatible with pretty much everything, yay (even modded armour!)
- Adds property overrides to ItemWand so that gets animated too
- Adds a system for generating override models from a template at runtime so I don't have to duplicate all the wand models
- Tweaks particles and ray spells so they line up with the end of the newly-animated wand
- Fixes a long-standing bug where wand usage actions would stop immediately for all non-continuous spells

src/main/resources/assets/ebwizardry/models/item/apprentice_wand.json

@@ -2,5 +2,13 @@
     "parent": "item/handheld",
     "textures": {
         "layer0": "ebwizardry:items/wand_apprentice"
-    }
+    },
+    "overrides": [
+        {
+            "predicate": {
+                "this_gets_ignored": 1
+            },
+            "model": "ebwizardry:item/override_generators/wand"
+        }
+    ]
 }