Add usb-device and stm32f103xx-usb WIP crates

[Disasm]

Thanks for submitting!

Category

Is this PR a:

• New Not Yet Awesome item?
• A WIP project addressing an open item?
• Removing a Not Yet Awesome item?

New Not Yet Awesome item checklist

• Is the request clearly stated, linking to relevant documentation, such as a whitepaper, protocol definition, datasheet, etc.?
• Are the "Success Criteria" defined?
• Is this request possible using today's Rust (not blocked by LLVM impl, rustc impl, etc.)?
• Is this request broken into reasonable work packages, such as "Create HAL for XYZ chip", not "support all boards from ABC vendor"?

WIP Project checklist

• Is there a link to the source project on GitHub/GitLab/etc?
• Is the project open source?
• Is it clear if contributions are welcome?
• Is the project relevant to the TODO item it addresses?
• Is the project more than just an empty repo or a placeholder (e.g. just a "hello world" bin.rs/lib.rs)?

Remove an item checklist

• Has the project that fixes the item been mentioned in the PR?
• Does the project address the original request fully?
• Has the crate that addresses the request has been added to the Awesome Embedded Rust list?
• Has the crate has been published on crates.io (or somewhere else where other people can consume it)?

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @thejpster (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[thejpster]

LGTM. Author seems to be interacting on Github regarding issues and changes, so happy to waive the unticked box.