refactor: Standardize guest Input format

[petarvujovic98]

Address taikoxyz#38

[petarvujovic98]

ad754cd starts work on taikoxyz#39

[petarvujovic98]

@CeciliaZ030 There is now a initial version of how the driver could work, but the compilation and linking of the powdr guest is not complete. My thinking is that we could compile the artifact (no_std powdr lib code) outside of the runtime call to reduce computation and simply have the runtime read the assembly file from a predetermined location. Than the runtime only needs to pass the inputs (serialized by the driver) and run the pipeline.

[CeciliaZ030]

Resolved taikoxyz#68