Add target="_blank" to links on the Website and in the GitHub readme

[CaptainException]

In the most cases when someone clicks on a link to a resource (like the docs, component library, node.js installation page, discord, twitter, etc.) they still want the original site to stay open. I checked many different links here on the github page and on the homepage and I didn't find any which opened in a new window. I assume target="_blank" is not used on any link. If this was changed it would make navigation easier and more convenient.

P.S.: I just noticed, that the link to python in the header of the readme links to the image instead of the python download page.

[picklelo]

Thanks for the suggestion, we will add this!