DevContainer should become the way translations are maintained

[kayhayen]

With the DevContainer the need for translation and staging sites are gone. It happened somehow that a wrong robots.txt was deployed on main site, and rebasing those branches also was never really happening a much as they should.

With the DevContainer you now run the site locally very easy. The @Nuitka/website team will be dissolved as a result, no special anything is needed anymore. Thanks to @Fire-Cube and @xinetzone for their help so far, but it seems it hasn't worked this way, and we we need to change. The docs in the main README are going to be improved further as we go. We need maintained translations, and i do not see it happen this way.