Upstream Rust Wrapper for Zephyr Drivers Proof-of-Concept

[jerrysxie]

Goal

Validate community acceptance of Rust-safe abstractions around Zephyr APIs.

Tasks

• Select minimal wrapper subset
• Prepare upstream-friendly PR
• Submit to zephyr-lang-rust
• Track reviewer feedback
• Document lessons learned

Deliverables

• Initial upstream PR
• Feedback summary
• Adoption recommendations

[kurtjd]

The best wrapper for our initial PR is the fuel gauge wrapper, as it's relatively straightforward (not a lot of safety or design related footguns that I can see), simple (so won't require a massive PR), and looking over the implementation in the PoC, is already written quite well and only requires a little bit more polish.

[kurtjd]

PR is up pending review: zephyrproject-rtos#167