Generate and publish JSDoc in gh-pages

[viccuad]

Developers benefit from having a browsable documentation for the functionality of the sdk. Provide developer docs.

Acceptance criteria

• Add a new make target to build the JSDoc into an html or markdown page that can be server statically. This can be done with something like https://www.npmjs.com/package/jsdoc-to-markdown.
• In the release job, before creating the GH release, call the new make target to generate the html page. Push it to the gh-pages branch of the repository, to be browsable.
• Add a link on the readme to the gh-pages.