docs: add fp-ts Tutorial series on YouTube to Learning Resources

[MrFunctor]

Hello! 👋 I've been working on an fp-ts Tutorial series on YouTube for some time now, and I've made a good amount of videos that will help people getting started with fp-ts. In these videos, I try to cover fp-ts in a practical way that does not require prior knowledge of functional programming.

Given that many people are finding these videos helpful, I think it's a good idea to add a link to the series in the Learning Resources. Let me know what you think! Thank you! 🙏

[webvv]

@MrFunctor Great content.

[MrFunctor]

Thank you @webvv! You make great content too! 🚀