Pygls Org and website.

[tombh]

We'd like to move Pygls over to a Github Org (https://github.com/pygls-org) and create a dedicated website (pygls.org).

In the org we could also include some other Pygls-related repos like Alex Carney's https://github.com/swyddfa/lsp-devtools and my https://github.com/tombh/super-glass-lsp

Although we wouldn't want to include general Pygls implementations in the org, we could also consider something like a separate pygls-contrib org for them. See #344 for some discussion.

At the least the website could just be a more stylised version of the README. But we're open to other ideas too.

We already have the relevant namespace and domain squatted.

Any thoughts or feedback?