simple wasm interpreter

This dependents walrus, anyhow, log only.

• call func with virtual system per eval operation
• register import func
• Coverage of some instruction. If not enough, we recommend pull-request.
• only 500 code lines
• used by my other project

let mut interpreter = walrus_simple_interpreter::Interpreter::new(&module)?;
interpreter.set_interrupt_handler(|_, instr, _| {
    println!("Interrupt handler called");
    println!("Instr: {instr:?}");

    Ok(())
});
interpreter.call(fid, self, &[])?;