Add learning resources doc

Author: abby-ql

src/community/learning-resources.md

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+#  Learning Resources
+
+This is a collection of community recommended resources for functional programming in Scala and materials that help contributors understand the ideas behind Typelevel libraries.
+
+> These resources are optional. You can start contributing with good first issues or examples and learn more as you go!
+
+## Foundational books & guides
+
+- **[Functional Programming in Scala](https://www.manning.com/books/functional-programming-in-scala-second-edition)**: A classic introduction to FP ideas in Scala; strong on the thinking behind libraries like Cats.  
+
+- **[Scala with Cats](https://scalawithcats.com)**:  Practical introduction to Cats
+
+- **[Essential Scala](https://underscore.io/books/essential-scala/)**: A functionally-friendly introduction to Scala language features. 
+
+- **[Creative Scala](https://www.creativescala.org/creative-scala/)**: Hands-on exercises and  usage for practising Scala.  
+
+## Documentation for Key Libraries
+
+- **[Cats Effect](https://typelevel.org/cats-effect/)**: Core to the modern Typelevel runtime model.
+  
+- **[FS2](https://fs2.io)**: Functional streaming library used throughout the ecosystem.  
+
+- **[http4s](https://http4s.org)**: Functional HTTP toolkit for Scala.  
+
+- **[Circe](https://circe.github.io/circe)**: JSON library for Scala.  
+
+- **[Laika](https://typelevel.org/Laika/)**: Site and E-book Generator and Customizable Text Markup Transformer in Scala
+
+
+## Tutorials & Courses
+
+- Coursera courses [Functional Programming in Scala](https://www.coursera.org/learn/scala-functional-programming) (useful if you prefer lecture-style learning and a systematic introduction).  
+- Community [blog posts](https://typelevel.org/blog/)
+
+## Scala ecosystem docs
+
+- **[Official Scala documentation](https://docs.scala-lang.org/)**: general language reference and guides