add uppercase file extension

[dlhxzb]

Bevy 0.16 had became case-sensitive for asset file extensions bevyengine/bevy#17065
So add uppercase STL extension to keep the original behavior of bevy_stl plugin

[nilclass]

Thank you for your contribution @dlhxzb.

I'm uncertain if this is a good change to do at this point. Upstream bevy loaders only support lowercase extensions, e.g. https://github.com/bevyengine/bevy/blob/031fa25ff689ffa6019b52324d6b66c4d538dea7/crates/bevy_gltf/src/loader/mod.rs#L227
If possible, I'd like to keep things consistent.

[dlhxzb]

Sure, consistent with bevy is good, but I really have logs of STL assets from mujoco menagerie, which can be loaded before 0.16
https://github.com/google-deepmind/mujoco_menagerie/tree/main/unitree_g1/assets

[dlhxzb]

@nilclass Otherwise would you please pub StlLoader? Then I can wrap it by my impl of AssetLoader for STL, just like bevy_obj

[nilclass]

@dlhxzb Thanks for sharing your use-case. I understand that this is frustrating.

However, I still think bevy_stl is not the right place to fix this issue.

In my opinion, the previous behavior of bevy was much better, see my comment over there: bevyengine/bevy#17065 (comment)

Otherwise would you please pub StlLoader? Then I can wrap it by my impl of AssetLoader for STL, just like bevy_obj

I've marked it public on main now, please point your dependency there. I'm not sure if it's a good solution long term though.