Question: No `SHADER_INT64` feature?

[noituri]

Hi, I've noticed that SHADER_INT64 feature is not exposed in wgpu-native. Other similar features such as SHADER_I16 and SHADER_F64 are available so I'm curious if it was done on purpose. If there are no blockers I could work on adding this.

Thanks

[cwfitzgerald]

Not on purpose, we'd appreciate a PR!