Automate the creation of documentation versions

[rmisev]

• Create documentation versions on git push --tags
• Automate updates to versions.txt (documentation versions)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (dbe4935) 99.72% compared to head (ba4e9ff) 99.72%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #20 +/- ## ======================================= Coverage 99.72% 99.72% ======================================= Files 15 15 Lines 2217 2217 ======================================= Hits 2211 2211 Misses 6 6 ```

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