Implement drag & drop components around workspace

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• https://stackoverflow.com/questions/9724308/drag-and-drop-cross-frames-use-html5
• https://github.com/react-dnd/react-dnd/issues/1496#issuecomment-518936256
• https://github.com/react-dnd/react-dnd/issues/1496#issuecomment-678810044
• https://codesandbox.io/s/github/react-dnd/react-dnd/tree/gh-pages/examples_hooks_ts/01-dustbin/single-target-in-iframe?from-embed=&file=/src/Container.tsx
• https://github.com/ryanseddon/react-frame-component

[benedyktdryl]

https://craft.js.org/r/docs/overview/ !!!

[benedyktdryl]

https://grapesjs.com/

[benedyktdryl]

https://webrix.amdocs.com/docs/components/poppable