Create a frontpage introducing the project

[it-vegard]

Explanation

At this time, the front page is the front page of the webshop, which is sensible for testing purposes.
However, for this site to be used more, it should have an introduction or landing page that explains what the project is about and how to use the site. It should link to the different languages, documentation, GitHub and also tasks for use in university classes and workshops.

Suggested solution

Use https://www.clothes4all.net as landing page as described above.
Use https://www.clothes4all.net/ as front page for each translation.
Remove links to "Documentation" in the header and "Resources" in the footer, leaving as clean a webshop as possible.
Possibly add a "back to landing page" link somewhere.

[it-vegard]

To enable translation of the front page as well, I will move all webshop pages to /[language]/shop/..., and portal pages (how to, assignments, docs, etc) to /[language]/....

I could, of course, move portal pages to /[language]/portal/..., but at this moment I don't see the use in that, other than possibly separating docs from actual portal pages.

Might make changes in the future, but I believe this will work for now.