Add a link to Gosling editor from landing page

[huyen-nguyen]

I like the design of the current page, it would also be very useful to have a direct link to the editor, from the main website of Gosling.

Potential solution

Adding an item on nav bar as Editor.

While we're at it, I'd suggest sorting the nav bar items alphabetically. It makes sense to me semantically, though it might look different to you.

Tutorials • Themes • Examples • Editor • Docs • About

or

About • Docs • Editor  • Examples • Themes • Tutorials

[dvdkouril]

I agree with the link to the Editor from gosling-lang.org.

@huyen-nguyen Would you like to make the PR? This belongs to https://github.com/gosling-lang/gosling-website if I'm not mistaken. I suggest to close this issue here.

[sehilyi]

Just transferred this issue to gosling-website. I like the idea as well.

[huyen-nguyen]

Thanks @dvdkouril and @sehilyi! I'll work on a PR for this.