docs(readme): add play.gno.land (#1489)

Please feel free to push commits to change the content.

closes #1486.

---------

Co-authored-by: Danny <salman.danny03@hotmail.com>
Co-authored-by: Morgan <git@howl.moe>

README.md

@@ -41,6 +41,14 @@ You can discover additional details about current tools and Gno documentation on
 our [official documentation](https://docs.gno.land). Additionally, the [awesome-gno](https://github.com/gnolang/awesome-gno)
 repository offers more resources to dig into. We are eager to see your first PR!
 
+## Gno Playground
+<a href="https://play.gno.land/p/VxDC6AmKmK6?run.expr=println(Render(%22%22))">
+  <img alt="play.gno.land" src="https://img.shields.io/badge/Play-Hello_World-691a00.svg?logo=data:image/svg%2bxml;base64,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" />
+</a>
+</br></br>
+
+[Gno Playground](https://play.gno.land), available at [play.gno.land](https://play.gno.land), is a web app that allows users to write, share, and deploy Gno code. Developers can seamlessly test, debug, and deploy realms and packages on Gno.land, while being able to collaborate with peers to work on projects together and seek assistance. A key feature of Gno Playground is the ability to get started without the need to install any tools or manage any services, offering immediate access and convenience for users.
+
 ## Repository structure
 
 * [examples](./examples) - Smart-contract examples and guides for new Gno developers.