Add script to build wheel for pycvc5 (#6839)

Add script to build wheel for pycvc5 (#6839)

This PR adds a script for building a wheel distribution for pycvc5. It automatically reads the top-level CMakeLists.txt to obtain the current version number, and then runs the standard setup from setuptools with an extension command class that configures and builds cvc5 with Python bindings. This wheel file is sufficient for uploading to Pypi. Although, note that we need to build for different operating systems and different Python versions because of the extension modules.

Note: another option is to use the scikit-build instead of doing the configuring and building manually. However, I ran into some issues when the setup.py file was not at the top-level. Because we prefer to have it hidden in a sub-folder, I took the manual route for now. In the future, we could consider changing this.