Add API Reference documentation as Github pages

[rdelillo]

Changelog Description

Addresses #21

• Implemented sphinx autodoc as ci workflow
• Few docstring edits to remove sphinx errors
• Sphinx configuration polishes

Result here : https://ynput.github.io/ayon-python-api/build/html/ (temporary url)

Additional info

Potential follow-up issues not covered by this PR:

• Split ayon-python-api API Reference documentation per concept #171
• Embedded API Reference content from ayon-python-api ayon-documentation#215

[rdelillo]

@jakubjezek001 I could reproduce but couldn't find any fix regarding the style hiccup you mentioned.

This definitely comes from the theme CSS .

• -webkit-font-smoothing: antialiased!important;
• font-size: 1rem;

It could be related to the page content being quite long to format... anyway, this is very inconsistent.
If that's an issue, I can probably inject a custom CSS sheet to prevent this.