Provide wheels on PyPI

Created by: filips123

You should provide pre-build wheels of PyAV on PyPI.

Currently, if you want to use PyAV, you need to compile it manually. This can cost quite a lot of time, and on Windows, you have to install VS Build Tools which are very heavy (more than 5 GB). This makes it quite hard to install and use PyAV.

You should provide pre-built wheels for all supported Python versions and systems on PyPI. You should use CI to automatically build and publish them.