✨ Feature: Add `strokeWidth` option to Circle style

## ✨ Feature Description

Circle style currently misses the option to change the stroke width of the circle.

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## 🤔 Why Is This Needed?

Allowing more customization would enhance this package's usability for developers than before. Additionally making all the styles use the same "API" for their config, would make the package even more developer friendly. :D
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