Could you add GraphQL?

[js-sketch]

Hi!

Would it be possible to add GraphQL as a language that's bundled with emacs-tree-sitter?

https://github.com/bkegley/tree-sitter-graphql is used by nvim-treesitter, so that should be OK.

If you write a small step-by-step guide I can attempt to perform the addition myself and open a PR for it.

[ubolonton]

The steps are:

• Add the repo as a git submodule and commit the change.
• Install the tools.
• Try building the grammar.

You can also look at #16 as an example.

[jcs090218]

Added in #1154.