Feature request: Support toggle blocks

[adamtheturtle]

Support toggles.
I think that this could be done with https://sphinx-toolbox.readthedocs.io/en/stable/extensions/collapse.html#sphinx_toolbox.collapse.visit_collapse_node.

[adamtheturtle]

See https://github.com/sphinx-contrib/confluencebuilder/blob/f58a3c3006863ee7472df20290f14d9b27dcc8fe/sphinxcontrib/confluencebuilder/transmute/ext_sphinx_toolbox.py#L48 for inspiration