Add @sanity-typed/zod to the "X to Zod" list

[saiichihashimoto]

I've made https://github.com/saiichihashimoto/sanity-typed/tree/main/packages/zod for converting sanity schemas to zod parsers, for use in applications. I'm getting traction in the slack community for the other sanity-typed libraries (the sanity team has already started convos with me) and I'd like to get this zod library listed on the zod site as well.