`embedded-hal` v1 transition

[jbeaurivage]

Summary

Transition some modules to embedded-hal version 1:

• [x] Implement embedded-hal for gpio
• [x] Implement embedded-hal fori2c
• [x] Implement embedded-hal for spi
• [ ] Implement embedded-hal-nb for spi
• [ ] Implement embedded-io for spi
• [ ] Implement embedded-io for uart
• [ ] Fix T1 BSP examples

Checklist

• [ ] CHANGELOG.md for the BSP or HAL updated
• [ ] All new or modified code is well documented, especially public items
• [ ] No new warnings or clippy suggestions have been introduced - CI will deny clippy warnings by default! You may #[allow] certain lints where reasonable, but ideally justify those with a short comment.

If Adding a new Board

• [ ] Board CI added to crates.json
• [ ] Board is properly following "Tier 2" conventions, unless otherwise decided to be "Tier 1"

If Adding a new cargo feature to the HAL

• [ ] Feature is added to the test matrix for applicable boards / PACs in crates.json