Add wrapper for importing Jetpack React components

[thingalon]

This PR adds support for adding Jetpack React components to the Boost dashboard.

Changes proposed in this Pull Request:

• Add ReactComponent Svelete component.

Jetpack product discussion

n/a

Does this pull request change what data or activity we track or use?

no

Testing instructions:

TBA

[github-actions[bot]]

Thank you for your PR!

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Boost plugin:

• Next scheduled release: March 28, 2022.
• Scheduled code freeze: March 21, 2022.

[thingalon]

This has been superseded by code that's already merged.