Separate Packet/Encoding Functions into new `compsci` module.

[engineerjoe440]

We should start looking at creating network-focused educational functions, and a selection of binary-centric functions (like what's the maximum number that a 32-, 64-, or n-bit variable can contain when it's signed, vs unsigned, etc.

For now, it makes sense that all of this can be brought into a single compsci submodule.