Add Caliban to the list of GraphQL libraries

[ghostdogpr]

Add Caliban, a Scala library for creating both GraphQL servers and clients.

[ghostdogpr]

Solved the conflicts. Any chance to get this one merged? 😄

[carolstran]

👋🏼 Thanks for taking the time to open this pull request! We're currently re-evaluating how we handle contributions to this Code page and pausing any changes until after those decisions are made. So I'm going to mark this PR as On hold and if you have any thoughts on this topic, it'd be great if you could voice them in #911

[synedu]

Caliban is a serious functional implementation of the GraphQL specification for the scala language, which is actively developed and has widespread and increasing adoption. It has been promoted as a GraphQL library by the founder of zio (https://twitter.com/jdegoes/status/1219690876047413248?lang=en). Is there anyone who feels that this library should not be included for some reason?

[carolstran]

Hey hey 👋🏼 the Gatsby migration (#938) has been merged so now we can update the content again. Could you please resolve the conflicts on your branch?

[ghostdogpr]

Closing in favor of #927 that has an example.