Add rollup-plugin-bookmarklet

[munierujp]

Awesome Contribution Checklist:

• [x] I have read, and re-read the Contributing Guidelines
• [x] I have searched to ensure the suggested item doesn't exist on this list
• [x] This PR contains only one item

Please Provide a Link A Repository for Your Addition

https://github.com/rollup-community/rollup-plugin-bookmarklet

Please Describe Your Addition

Add javascript: prefix for bookmarklet to code.