Integrate the Coinbits personas

[GBKS]

Dave from Coinbits shared 4 personas they developed in-house to guide their design process. Those could be a nice addition to the user personas page, and probably also a good reference for the Bitcoin UX Research Kit.

[mouxdesign]

Very good ideas to add these to both the Design Guide as well as the UX research toolkit.

Adding in the link here to the text version of the 4 personas.

Figma

[GBKS]

I can't open the Figma link. It was probably just shared with your personal account. I also don't think we necessarily need to copy much content into the guide. We can just reference the personas as an external resource.

[GBKS]

This was completed via #1095. Check it out live.