Allow article header buttons to be excluded

[choldgraf]

Context

This theme populates the buttons in the "article header" via the template below:

https://github.com/executablebooks/sphinx-book-theme/blob/master/src/sphinx_book_theme/theme/sphinx_book_theme/components/article-header-buttons.html

Several buttons are hard-coded (for example, the theme switcher, which some people want to remove, ref: #750)

We should make it possible for these buttons to be added/removed rather than hard-coding them.

Proposal

We could use a list of template names similar to what we do with the sidebar templates. The way those work is that the user defines a list of strings that correspond to template names in conf.py and those are used to populate the sidebar:

sphinx-book-theme/src/sphinx_book_theme/theme/sphinx_book_theme/theme.conf

Line 4 in 7154785

sidebars = navbar-logo.html, icon-links.html, search-button-field.html, sbt-sidebar-nav.html

Tasks and updates

• Would close: Add an option to remove dark/light mode button #750