add badge for type coverage rate?

[myan9]

It would be nice to offer a TypeWiz badge for repo's type coverage rate.

[urish]

I love this idea :)

[urish]

Any ideas how other badges are implemented? Are there any services/libraries that aid with this?

[starpit]

for the two typecov badges on https://github.com/IBM/kui we are using serverless functions to host the backend for a shields.io endpoint: https://shields.io/endpoint

(when you click on the badges right now, you get the raw JSON coverage report that i have been working on; see #95 for related discussion)

[urish]

Thanks for the info!