Blender v4 support

[UuuNyaa]

Pull request for Blender 4.2 LTS destructive API changes.

Blender 4.x is currently under development with destructive API changes from 3.x.
And MMD Tools is focusing on support for LTS versions, as shown by the following URL: https://mmd-blender.fandom.com/wiki/MMD_Tools#Requirements
So this pull request will prepare for future 4.2 LTS.

📋 Todo

• Blend file migration
• Object.pose_library
• Remove SceneOp
• remove ItemOp
• remove bpyutils.select_object
• remove utils.selectAObject
• remove auto_scene_setup
• remove core.exceptions
• remove cycles_converter
• remove auto_scene_setup
• remove FnObject

✔️ Done

• rename Model to MMDModel
• remove addon_updater
• Set a BL_Order to all the panels so that the panels stay in the exact same order every time you load blender #121
• Bone Collections, Colors, Layers and Groups
  • https://wiki.blender.org/wiki/Reference/Release_Notes/4.0/Animation_Rigging/Bone_Collections_%26_Colors:_Upgrading
• Shader Nodes
• Overriding Context
  • https://docs.blender.org/api/current/bpy.ops.html#overriding-context
• rename activate_layer_collection -> FnContext.temp_override_active_layer_collection
• rename find_user_layer_collection -> FnContext.find_user_layer_collection_by_object
• rename ObjectOp.shape_key_remove -> FnObject.mesh_remove_shape_key
• remove ObjectOp
• remove addon_preferences
• Translation
  • https://projects.blender.org/blender/blender-ui-translations
• Code format
  • https://github.com/psf/black
• Remove legacy code
• Remove layers, calc_normals_split, free_normals_split, use_auto_smooth, calc_normals, auto_smooth_angle
• Deprecate Object.select and Object.hide properties
  • We should use alternative methods Object.select_set()/Object.select_get() and Object.hide_set()/Object.hide_get()

[UuuNyaa]

Models can now be loaded, but we still have a long way to go.

blender4-bone_layers.mp4