Feature request: find models based on mesh file type

[scpeters]

Gazebo supports STL, OBJ, and DAE meshes, and Fuel allows these file extensions to be uploaded. There are some non-Gazebo applications that could potentially make use of Fuel, but these applications may not have support for all these mesh types. For example, Drake doesn't support DAE or STL meshes ( RobotLocomotion/drake#14436 ), so if they were going to experiment with Fuel, they would want to search for Fuel models that don't require DAE and STL meshes or to explicitly search for models with OBJ meshes.

This could be implemented through the search feature or by applying tags to models based on the mesh types that they reference.