Enforce consistent type hinting throughout toffy

[alex-l-kong]

Is your feature request related to a problem? Please describe.

A lot of modules (ex. tiling_utils.py) don't consistently enforce type hinting rules. This is good practice to have, so in the long run, we should work on adding this in to all the Python modules.

Describe the solution you'd like

Add type hints to needed function parameters and doctrings. This can be done using the typing module.

[ngreenwald]

Can be incorporated into individual PRs when people make changes