Add CLI Support for pipx

[jasonacox]

v1.13.3

• Add support for pipx install tinytuya as raised by @felipecrs in https://github.com/jasonacox/tinytuya/issues/500 allowing for easier CLI use.
• Possible breaking change: Running tinytuya by itself will now produce a "Usage" page instead of running a scan. Use tinytuya scan or python -m tinytuya scan.

Closes #500

[uzlonewolf]

Here's the one I've been working on: https://github.com/uzlonewolf/tinytuya/tree/argparse

[jasonacox]

We can focus on https://github.com/jasonacox/tinytuya/pull/503

[uzlonewolf]

Superseded by #503