Update bool type to use 1 byte in memory

[obycode]

The bool is represented on the stack as an i32 simply because that is an easy type to work with. When it is written to memory, I defaulted to writing the full i32 because that seemed like the easiest solution. After writing more code, I see that it is also very easy to handle reading/writing a single byte for the bool, and save some space in the memory. I don't think this improves performance at all, just data size, so it is not urgent.

[obycode]

Similarly for the indicators of optional and response types.