Figma Community Plugins badges

:clipboard: **Description**

Useful metrics could include:

- Plugin version
- Plugin user count

Example:

Many Figma plugin developers maintain GitHub repositories and would like to display plugin adoption and current version directly in their README files.

I recently built a Figma plugin and found that there is currently no Shields badge available for these metrics.

The issue proposes Shields badges for Figma Community Plugin version and user-count metrics. Start by reviewing existing Shields badge integrations and how Figma Community plugin metadata can be retrieved; done means both metrics are exposed as working badges with appropriate tests and documentation.

Written by the indexing model from the issue text.