Extend support for Apple Silicon

[emberian]

simple update of @brandonros original PR on top of #90 (for after that is merged)

Closes #75

[brandonros]

💪

[vmx]

I've merged the other PR, hence this one needs a rebase and some Clippy fixes.

[BigLep]

@emberian : do you want to get this updated so CI passes?

[BigLep]

@rvagg : is this worth getting over the line or just closing for now until this is more interest?

[rvagg]

worth getting this over the line

[Copilot]

Pull Request Overview

This PR extends support for Apple Silicon while also refactoring error handling and streamlining unsafe block usage in both OpenCL and CUDA modules. Additionally, the version upgrades in the toolchain and dependencies ensure compatibility with recent releases.

• Changed error wrapping in OpenCL and CUDA modules from tuple to struct-style.
• Added Apple vendor identifiers and strings to support Apple Silicon.
• Updated toolchain and dependency versions for improved language and library support.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/opencl/mod.rs	Refactored error returns to use struct-style and streamlined unsafe block style
src/error.rs	Updated GPUError::Opencl3 variant to a structured format
src/device.rs	Added Apple vendor string and vendor ID along with new Vendor::Apple variant
src/cuda/utils.rs	Added attribute to suppress unused warnings in CudaContexts
src/cuda/mod.rs	Replaced map_err with inspect_err and streamlined unsafe block usage
rust-toolchain	Bumped rust version from 1.70.0 to 1.81.0
Cargo.toml	Upgraded dependency versions and updated rust-version to 1.81.0

[BigLep]

worth getting this over the line

@rvagg : with Claude, I got this updated and passing. Ready for review.

[rvagg]

I think the right way to do this is add them both to rust-toolchain.toml