Break up wgpu-types/src/lib.rs into more files.

[kpreid]

Connections
Part of #8596.

Description
Breaks up wgpu-types/src/lib.rs into more files. The criteria used for subdivision are:

• Maximum unit: Files should be 1000 lines or shorter. (texture/format.rs is an exception.)
• Minimum: There are multiple items which are useful to read together.

Beyond the strictly necessary, I also added warn(unused_qualifications). This lint is useful to keep code more consistent during any future moves, and in general when there are many modules and use ::*s.

$ git diff trunk --stat wgpu-types/src/adapter.rs | 220 +++++ wgpu-types/src/backend.rs | 674 ++++++++++++++ wgpu-types/src/binding.rs | 341 +++++++ wgpu-types/src/buffer.rs | 162 ++++ wgpu-types/src/counters.rs | 4 +- wgpu-types/src/device.rs | 103 ++ wgpu-types/src/instance.rs | 475 +--------- wgpu-types/src/lib.rs | 8354 +++++-------------------------------------------------------------------------------------------------------------------------------------------------------------- wgpu-types/src/limits.rs | 920 ++++++++++++++++++ wgpu-types/src/origin_extent.rs | 192 ++++ wgpu-types/src/ray_tracing.rs | 177 ++++ wgpu-types/src/render.rs | 941 +++++++++++++++++++ wgpu-types/src/send_sync.rs | 67 ++ wgpu-types/src/shader.rs | 185 ++++ wgpu-types/src/surface.rs | 323 +++++++ wgpu-types/src/texture.rs | 1098 ++++++++++++++++++++++ wgpu-types/src/texture/external_image.rs | 160 ++++ wgpu-types/src/texture/external_texture.rs | 167 ++++ wgpu-types/src/texture/format.rs | 2482 +++++++++++++++++++++++++++++++++++++++++++++++++ wgpu-types/src/vertex.rs | 282 ++++++ 20 files changed, 8736 insertions(+), 8591 deletions(-) 

Testing
xtask test + cargo doc

Squash or Rebase?
Ideally this would be merged strictly as a fast-forward to minimize the chance of mis-merges, but GitHub doesn't let you do that, so, uh, rebase.

Checklist

• Run cargo fmt.
• Run taplo format.
• Run cargo clippy --tests. If applicable, add:
  • --target wasm32-unknown-unknown
• Run cargo xtask test to run tests.
• If this contains user-facing changes, add a CHANGELOG.md entry.

[cwfitzgerald]

Some nits and a question, but we can deal with all of them in a follow up

[kpreid]

CI is happy now.

[cwfitzgerald]

Lets go!