Add bootstrap 5 and bootblog5 themes in mako and jinja

[dacog]

Pull Request Checklist

• I’ve read the guidelines for contributing.
• I updated AUTHORS.txt and CHANGES.txt (if the change is non-trivial) and documentation (if applicable).
• I tested my changes.

Description

I added the Bootstrap 5 and Bootblog5 themes for Bootstrap 5.3.

I did the following:

• I updated the bootstrap 4 mako versions with the new classes and libraries.
• I added support to jinjify.py for the new themes, and used it to create the jinja versions.
• I added support for the new libraries along the old lobraries (bootstrap 4 and bootstrap5) using aliases in package.json
• I added support for the new themes and libraries in the update-npm-assets.sh and run it to add the assets for the new themes.
• I updated the subtheme command to support bootstrap 5

I could not find baguetteBox-links-with-images-only.patch to patch baguetteBox. Is this still required?

I tested by installing my modified nikola locally (pip install -e .) and created a new demo site.
Then I used a demo site (nikola init -qd) and run a nikola build -a for each theme.
I then created a new subtheme nikola subtheme -p bootstrap5 -n daco -s journal and checked that it was ok.

I think that was in summary.

Somewhere I read that nikola uses the jinjify.py to create the jinja versions, that is why I created the mako versions first and updated the scripts so that they worked with the new versions.

Here is the home of the demo for each new theme as examples.

I hope this helps. Let me know if I need to change anything.

Best,

Diego