REQUIRED BY ssr#263239 

- Switch to setup.py based installation for compatibility with
  old SLE distros.

- Update to 2022.1 (jsc#SLE-20253):
  - Add a configuration for license URL.
  - Exclude the floating navbar from CHM help.
  - Make sidebar scrollable and sticky (on modern browsers)
  - Fix monospace again, on buggy Google Chrome
  - Add the copyright_url variable in the theme
  - Improve readability
  - Remove #searchbox on mobile to fix a layout bug
  - Fix the appearance of version/language selects
  - Make the theme responsive
  - Use default pygments theme
  - Test Github action to validate the theme against docsbuild scripts.
  - Add the copy button to pycon3 highlighted code blocks.
  - Updated the readme, to remind user to install the package in a virtual environment.
  - Updated the package url, using the GitHub repository instead of docs.python.org
  - Added license information to the footer of the doc
  - Fixed typo in the footer
  - Added information on how to use the package
  - Fixed code formatting
  - Fixed code bgcolor and codetextcolor for Sphinx 3.1.0+

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initialize package

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