Add a releases & changelog page to the docs

[jemissik]

Add a section for releases to make this easier to find. To include:

• [ ] Links to releases: latest release and all releases
• [ ] Add a note about pre-releases
• [ ] Add a note about being able to have two versions installed at the same time
• [ ] Render a changelog in the docs pages to make this easier to find (pulled from the GitHub Releases). Use https://sphinx-github-changelog.readthedocs.io/en/latest/ for this