Replace tinystl with stl_io to support more stl files

[oxkitsune]

What

This replaces tinystl with stl_io in our stl parser, because some binary stl files (e.g. g1 right_wrist_yaw_link.STL) could not be parsed, resulting in a warning:

 Failed to load mesh "../unitree_ros/robots/g1_description/meshes/right_wrist_yaw_link.STL": Error loading STL mesh: Error { kind: InvalidData, message: "stream did not contain valid UTF-8" }

Using stl_io this mesh is parsed correctly.

TODO:

• Currently this uses an empty string for the mesh name as debug label, as stl_io does not expose this field. This is in line with the behavior of tinystl for meshes without a name. I opened a PR that exposes the mesh name: Add optional mesh name hmeyer/stl_io#26

[github-actions]

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Result	Commit	Link	Manifest
✅	7f0d9b9	https://rerun.io/viewer/pr/9997	+nightly +main

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[Wumpf]

please make sure to test this with a wide variety of STL files

[Wumpf]

See comments above. Thanks for the manual testing earlier (Slack message pointed out testing done!), but a bit of that has to be redone with the proposed improvements

[Wumpf]

This library makes me unhappy since I don't think its datastructures make any sense in the context of STL. But whatever, if we ever care deeply about loading performance here, we can fork it proper later. It loading more files is obviously more important!

good to land if collect issue & crate question are addressed!