feat(exchange): native Kevin Iglesias pickaxe mining FBX for iClone editing
Two-hand Mining set (Begin/Loop Ground/Loop Wall/Stop) on the native B-* rig,
pulled from ariki-assets animations/kevin-iglesias. Native rig (not the
Quaternius-retargeted game GLB) so iClone can characterize the skeleton to HIK.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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