Jekyll front matter is used to add attributes to web pages on our web site. All the patterns have their front matter defined in README.md but description is missing from there. description is used to add HTML meta tag to the pattern's web page as can be seen here: https://github.com/iluwatar/java-design-patterns/blob/gh-pages/_includes/head.html#L8

mapObject's explanation is not up to standards with our current format. It should be updated to match the rest of the snippets.

We could also make the example a one-liner.

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Put "Add ____" as Title
[X] Done

Provide a link to the proposed addition.
https://github.com/sindresorhus/quick-look-plugins

Explain why it should be added
Currently QuickLook Plugins section contains the only item.
The proposed set represents useful plugins for QuickLook.

Additional context
Plugins are useful for developers.

Issue Checklist

Put an x in the

This is such an important part for language users and seeing how many people are for various reasons are not entirely happy with doxygen it'd be cool to list some viable alternatives.

Approximate list of links to tools I've found, just for reference:

• https://github.com/doxygen/doxygen
• https://github.com/jessevdk/cldoc
• https://github.com/foonathan/standardese
• https://github.com/micha

There may be paid VS Code extensions or content that could be beneficial to list here. Currently there is no direct notice in the contributing guide that submissions should only be publicly available / free resources, so I think at least it would be good to update the guide with our stance on it.

I do think pushing free resources first should be a priority, but if there is a paid resource that