feat: Add VRM Blender addon with complete import/export functionality

- Add core VRM addon infrastructure with manifest and registration
- Add common utilities module with file system, logging, and conversion helpers
- Add human bone mapper with support for multiple rigging standards (Mixamo, MMD, Unreal, Rigify, etc.)
- Add VRM 0.x and 1.x format support with property groups and handlers
- Add editor UI panels for VRM metadata, spring bones, and MToon materials
- Add exporter with glTF2 extension support for VRM format serialization
- Add importer with scene reconstruction and armature generation
- Add MToon shader support with auto-setup and material migration
- Add spring bone physics simulation with constraint handling
- Add node constraint editor for advanced rigging control
- Add comprehensive validation and error handling with user dialogs
- Add scene watcher for real-time property synchronization
- Add workspace management and preference system
- Include Python cache files and Blender manifest configuration
- This is the initial commit establishing the complete VRM addon ecosystem for Blender

common/human_bone_mapper/rigify_meta_rig_mapping.py

@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: MIT OR GPL-3.0-or-later
+from collections.abc import Mapping
+from typing import Final
+
+from ..vrm1.human_bone import HumanBoneSpecification, HumanBoneSpecifications
+
+MAPPING: Final[Mapping[str, HumanBoneSpecification]] = {
+    "spine.006": HumanBoneSpecifications.HEAD,
+    "spine.001": HumanBoneSpecifications.SPINE,
+    "spine": HumanBoneSpecifications.HIPS,
+    "upper_arm.R": HumanBoneSpecifications.RIGHT_UPPER_ARM,
+    "forearm.R": HumanBoneSpecifications.RIGHT_LOWER_ARM,
+    "hand.R": HumanBoneSpecifications.RIGHT_HAND,
+    "upper_arm.L": HumanBoneSpecifications.LEFT_UPPER_ARM,
+    "forearm.L": HumanBoneSpecifications.LEFT_LOWER_ARM,
+    "hand.L": HumanBoneSpecifications.LEFT_HAND,
+    "thigh.R": HumanBoneSpecifications.RIGHT_UPPER_LEG,
+    "shin.R": HumanBoneSpecifications.RIGHT_LOWER_LEG,
+    "foot.R": HumanBoneSpecifications.RIGHT_FOOT,
+    "thigh.L": HumanBoneSpecifications.LEFT_UPPER_LEG,
+    "shin.L": HumanBoneSpecifications.LEFT_LOWER_LEG,
+    "foot.L": HumanBoneSpecifications.LEFT_FOOT,
+    "eye.R": HumanBoneSpecifications.RIGHT_EYE,
+    "eye.L": HumanBoneSpecifications.LEFT_EYE,
+    "jaw": HumanBoneSpecifications.JAW,
+    "spine.004": HumanBoneSpecifications.NECK,
+    "shoulder.L": HumanBoneSpecifications.LEFT_SHOULDER,
+    "shoulder.R": HumanBoneSpecifications.RIGHT_SHOULDER,
+    "spine.003": HumanBoneSpecifications.UPPER_CHEST,
+    "spine.002": HumanBoneSpecifications.CHEST,
+    "toe.R": HumanBoneSpecifications.RIGHT_TOES,
+    "toe.L": HumanBoneSpecifications.LEFT_TOES,
+    "thumb.01.L": HumanBoneSpecifications.LEFT_THUMB_METACARPAL,
+    "thumb.02.L": HumanBoneSpecifications.LEFT_THUMB_PROXIMAL,
+    "thumb.03.L": HumanBoneSpecifications.LEFT_THUMB_DISTAL,
+    "f_index.01.L": HumanBoneSpecifications.LEFT_INDEX_PROXIMAL,
+    "f_index.02.L": HumanBoneSpecifications.LEFT_INDEX_INTERMEDIATE,
+    "f_index.03.L": HumanBoneSpecifications.LEFT_INDEX_DISTAL,
+    "f_middle.01.L": HumanBoneSpecifications.LEFT_MIDDLE_PROXIMAL,
+    "f_middle.02.L": HumanBoneSpecifications.LEFT_MIDDLE_INTERMEDIATE,
+    "f_middle.03.L": HumanBoneSpecifications.LEFT_MIDDLE_DISTAL,
+    "f_ring.01.L": HumanBoneSpecifications.LEFT_RING_PROXIMAL,
+    "f_ring.02.L": HumanBoneSpecifications.LEFT_RING_INTERMEDIATE,
+    "f_ring.03.L": HumanBoneSpecifications.LEFT_RING_DISTAL,
+    "f_pinky.01.L": HumanBoneSpecifications.LEFT_LITTLE_PROXIMAL,
+    "f_pinky.02.L": HumanBoneSpecifications.LEFT_LITTLE_INTERMEDIATE,
+    "f_pinky.03.L": HumanBoneSpecifications.LEFT_LITTLE_DISTAL,
+    "thumb.01.R": HumanBoneSpecifications.RIGHT_THUMB_METACARPAL,
+    "thumb.02.R": HumanBoneSpecifications.RIGHT_THUMB_PROXIMAL,
+    "thumb.03.R": HumanBoneSpecifications.RIGHT_THUMB_DISTAL,
+    "f_index.01.R": HumanBoneSpecifications.RIGHT_INDEX_PROXIMAL,
+    "f_index.02.R": HumanBoneSpecifications.RIGHT_INDEX_INTERMEDIATE,
+    "f_index.03.R": HumanBoneSpecifications.RIGHT_INDEX_DISTAL,
+    "f_middle.01.R": HumanBoneSpecifications.RIGHT_MIDDLE_PROXIMAL,
+    "f_middle.02.R": HumanBoneSpecifications.RIGHT_MIDDLE_INTERMEDIATE,
+    "f_middle.03.R": HumanBoneSpecifications.RIGHT_MIDDLE_DISTAL,
+    "f_ring.01.R": HumanBoneSpecifications.RIGHT_RING_PROXIMAL,
+    "f_ring.02.R": HumanBoneSpecifications.RIGHT_RING_INTERMEDIATE,
+    "f_ring.03.R": HumanBoneSpecifications.RIGHT_RING_DISTAL,
+    "f_pinky.01.R": HumanBoneSpecifications.RIGHT_LITTLE_PROXIMAL,
+    "f_pinky.02.R": HumanBoneSpecifications.RIGHT_LITTLE_INTERMEDIATE,
+    "f_pinky.03.R": HumanBoneSpecifications.RIGHT_LITTLE_DISTAL,
+}
+
+CONFIG: Final = ("Rigify Meta-Rig", MAPPING)