Initial release

[MabezDev]

• [x] Rename Device trait to BlockDevice, find a new name for the BlockDevice <=> embedded-io wrapper.
• [x] #17
• [x] #16
• [x] Ensure it can build on stable
  • [x] Update or remove usage of async iter
• [ ] Cut a block-device-driver release and PR some impls to hals
  • [x] Should alignment be part of the base trait?
  • [x] Waiting on aligned release for new release
• [x] Remove the File::new_from_context API, it's easy to misuse: https://github.com/MabezDev/embedded-fatfs/pull/28
• [x] #19
• [ ] #12