Convert Hash IR into Hash bytecode

This is the process of converting the generated Hash IR from the `hash-lower` stage into runnable Hash bytecode as defined within the `hash-vm` crate.

This means that there should be a `hash-codegen-vm` crate that can take in IR Bodies, and produce runnable bytecode blocks. Additionally, bytecode blocks may need to be extended with locations in order to provide some sense of where the instructions and blocks come from (in reference to the source code).