RFE: Setting up readthedocs (and extend documentation)

[engelmi]

Currently, the existing documentation for QM is limited to the directory docs/ directory, which provides documentation for users to some degree. However, instead of using plain READMEs in the repository it would be better to have a dedicated webpage (e.g. via readthedocs) for user documentation. This can then be easily extended, e.g. by showing how ti enable Wayland in QM, maintained and it provides a nice way of presentation for users of QM.

Other projects like BlueChi (see https://bluechi.readthedocs.io/en/latest/ ) and tmt (https://tmt.readthedocs.io/en/stable/) use readthedocs, thus I'd suggest using it as well. Setting up readthedocs in QM (with the currently existing doc content) would be the first step. Subsequently, the documentation can be extended and refined.
Depending on capacity, I'd be up for implementing the readthedocs setup.
@dougsland @Yarboa @pypingou What do you think?

[Yarboa]

Better documentation high chances for more contribution.
@kleinffm do you have a bandwidth to assist in that ticket?