pip install is missing files

[FoamyGuy]

When you install the library via pip it's missing many of the library code files.

I think we need to include more entries in the list in setup.py like this:

packages=[
        "adafruit_displayio_layout",
        "adafruit_displayio_layout.layouts",
        "adafruit_displayio_layout.widgets",
    ],

I tested this approach locally by using pip install . and it does seem to allow the library to install correctly.