Co-authored-by: openhands <openhands@all-hands.dev>
Update codegen to make `bytes` imports conditional on the `alloc` feature and add a test example for the `thumbv7em-none-eabihf` target.
Add #![no_std] to the runtime crate and introduce optional std and alloc features. Update the code generator to be compatible and add a no_std_test example. Remove the generator binary.