Add SnapDOM

[tinchox5]

Checklist:

• I've read and understood Contributing Guidelines.
• I've added the new resource at the end of its section.
• This resource is out there for a while, and actively maintained.
• This resource is popular enough and has at least a few hundred stars on GitHub.

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SnapDOM captures DOM elements as PNG, JPG, WebP or SVG in the browser, with no dependencies. There are also plugins for PDF with searchable text and true vector SVG. It has around 8k stars and regular releases. I'm the maintainer.

[gokaygurcan]

thanks