Automate the release process

[LegalizeAdulthood]

Currently the release process is done by hand and there is a chance for errors as a result.

See if we can create an automated release process that is triggered by pushing a version tag.

1. Build HTML docs
2. Build the code in RelWithDebInfo configuration
3. Package the code
4. Create a release from the tag
5. Populate release ReadMe with boiler plate
6. Add built assets to the release
7. Update github pages from HTML docs

Maybe some/all of this can be done with github actions and github API?

[LegalizeAdulthood]

See https://github.com/softprops/action-gh-release