Add `sonda` - visualizer and analyzer for JavaScript and CSS bundles

[filipsobol]

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/filipsobol/sonda

Please Describe Your Addition

Sonda is a universal visualizer and analyzer for JavaScript and CSS bundles. It works with Rollup as well as other bundlers.

If you submit a project that is similar to an existing project in the list, please explain how you feel yours is better.

Sonda is similar to rollup-plugin-visualizer, but it offers some additional features, such as that it:

• works with both JavaScript and CSS files,
• shows more accurate results by default,
• shows more details about individual files,
• can read source maps of dependencies, which may be useful when debugging tree-shaking issues or optimizing build size,
• warns about duplicated modules,
• looks better visually (subjective).

It offers more minor improvements, but these are the main ones.