Added editor "Code - A sandbox for fast prototyping"

[nikita-kun]

https://github.com/nikita-kun/code A simple and efficient alternative to jsfiddle, codepen, codesandbox, etc. Useful for quick experiments with generated code, keeps code client-side in (long) URLs instead of third-party servers.

Demo usecase

Features

• Simple HTML sandbox
• Accepts single HTML with embedded JS and CSS
• Code is stored and rendered client-side
• Console
• Save as URL or file
• Customizable (make a fork)

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• I've read and understood Contributing Guidelines.
• I've added the new resource at the end of its section.
• This resource is actively maintained.

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