added a bespoke JSX theme engine to render node forms

README-to-see-what-this-demonstrates.md

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...ules/contrib/same_page_preview/same_page_preview.info.yml

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...es/contrib/same_page_preview/src/Form/PreviewNodeForm.php

web/modules/custom/eb_form_sandbox/.gitattributes

web/modules/custom/eb_form_sandbox/.gitignore

web/modules/custom/eb_form_sandbox/eb_form_sandbox.info.yml

...ules/custom/eb_form_sandbox/eb_form_sandbox.libraries.yml

web/modules/custom/eb_form_sandbox/eb_form_sandbox.module

web/modules/custom/eb_form_sandbox/js/app/dist.css

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web/modules/custom/eb_form_sandbox/js/app/linaria.config.js

...form_sandbox/js/app/local_packages/hyperscriptify/LICENSE

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...packages/hyperscriptify/examples/_introduction/index.html

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