Add links to live javadocs + c++ doxygen docs for PhotonLib similar to WPILib

[mdurrani808]

Need to get someone to write the github actions to publish but shouldn't be too hard given WPILib probably already has the actions script done. Need somewhere to host them, or gh-pages.

Relevant:
Publish javadocs with GitHub Actions (#968) · WPIRoboticsProjects/GRIP@c079aa0
Using GitHub Actions to Publish Doxygen Docs to GitHub Pages - DEV Community 👩‍💻👨‍💻