Update the documentation about Remote Modules

Target documentation resources

Documentation about the Remote Modules can be found in many places :

Change requested

It would be better to have the documentation about the Remote Modules in one place, well organized, and up to date. I think the CookBook is the best place for this documentation. Other resources should then link to the CookBook page. A table of content could be:

  1. Introduction (what are remote modules)
  2. Installation of remotes modules (for users who want to use a remote module)
  3. Writing a remote module (for user who want to write a remote module)
    1. The steps to make a remote module
    2. Making it official (what to do to add the remote module to https://gitlab.orfeo-toolbox.org/remote_modules)