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.

ui/main_panel.py

@@ -0,0 +1,21 @@
+import bpy
+from ..core.translations import t
+
+CATEGORY_NAME = "Avatar Toolkit"
+
+def draw_title(self: bpy.types.Panel):
+    layout = self.layout
+    layout.label(text=t("AvatarToolkit.desc1"))
+    layout.label(text=t("AvatarToolkit.desc2"))
+    layout.label(text=t("AvatarToolkit.desc3"))
+
+class AvatarToolKit_PT_AvatarToolkitPanel(bpy.types.Panel):
+    bl_label = t("AvatarToolkit.label")
+    bl_idname = "OBJECT_PT_avatar_toolkit"
+    bl_space_type = 'VIEW_3D'
+    bl_region_type = 'UI'
+    bl_category = CATEGORY_NAME
+
+    def draw(self: bpy.types.Panel, context: bpy.types.Context):
+        draw_title(self)
+