Add JSON Schema Editor to Web UI generation

[thomas4019]

This is a meta tool for modifying JSON schemas using React. I think this is a useful addition because the existing editors do not work well for actually modifying JSON Schemas. Please let me know if I should change anything.

[Relequestual]

Hey Thomas, Thanks for the PR.
Looks like you made an editor, so please put that under the editor section rather than UI generation.
Cheers

[Relequestual]

Please move to Editors section

[thomas4019]

Good point! I've updated it to now be under the editors section.

[Relequestual]

Thanks.

Are you planning to update it to work with things like $ref and allOf?
It's not really that useful without these...

[thomas4019]

Hi Ben,
Thanks for the review. I'm not planning on making these changes at the moment, but once I get around to adding those (and being more fully compliant with the standard) then I'll open a new PR. Thanks!