Plugin Registration Changes

- Re-wrote how the plugin registers itself.
- No longer need @register_wrapper classes get auto detected and added.
- The new Auto loader is much better then the old way, no longer need "if "bpy" not in locals():" this was an old way of doing things and wasn't really efficient.

 using auto_load.py provides several advantages:

- It automatically discovers and loads all modules in the addon.
- It handles dependencies between classes correctly through topological sorting.
- It manages registration order automatically.
- It properly handles unregistration in the correct order.

This approach is much less error prone and I not had any issues so far. However it still needs testing fully.

I have also start to re-organise files into folders as well, this is going to be needed so we don't have a long list of files as Avatar Toolkit is getting larger then i originally planned.

functions/rigify_functions.py

@@ -1,18 +1,9 @@
 # This code is heavily based on the Rigify-Move-DEF by NyankoNyan (https://github.com/NyankoNyan/Rigify-Move-DEF), which is licensed under the MIT License. We just heavily improve the code and add some new features.
-
 import bpy
-from ..core.register import register_wrap
 from ..core.common import get_selected_armature, is_valid_armature
-from ..functions.translations import t
+from ..core.translations import t
 from bpy.types import Operator, Context
 
-import bpy
-from ..core.register import register_wrap
-from ..core.common import get_selected_armature, is_valid_armature
-from ..functions.translations import t
-from bpy.types import Operator, Context
-
-@register_wrap
 class AvatarToolKit_OT_ConvertRigifyToUnity(Operator):
     bl_idname = "avatar_toolkit.convert_rigify_to_unity"
     bl_label = t("Tools.convert_rigify_to_unity.label")