Dobot thumbnails

Captured directly from Rerun 0.36 using the official Dobot URDF meshes. Source: https://github.com/Dobot-Arm/DOBOT_6Axis_ROS2_V4

Regenerate in the Synapse repository with python scripts/render_dobot_thumbnails.py. All models use joint angles [0, 30, -65, 35, 30, 0] degrees, a light background, and the same camera direction with framing scaled to each model. The PNGs are unedited captures of the 3D view. See LICENSE for mesh licensing.