chore: update readme

Author: agviegas

README.md

@@ -72,6 +72,10 @@ world.scene.setup();
 world.camera.controls.setLookAt(3, 3, 3, 0, 0, 0);
 ```
 
+## 🤝 Contributing
+
+Thinking of sending a PR? Awesome! Please read our [contributing guide](https://docs.thatopen.com/contributing) first — it covers the code conventions we follow (JSDoc, examples, resources, etc.) so your changes sail through review.
+
 
 [npm]: https://img.shields.io/npm/v/@thatopen/components
 [npm-url]: https://www.npmjs.com/package/@thatopen/components

packages/core/README.md

@@ -72,6 +72,10 @@ world.scene.setup();
 world.camera.controls.setLookAt(3, 3, 3, 0, 0, 0);
 ```
 
+## 🤝 Contributing
+
+Thinking of sending a PR? Awesome! Please read our [contributing guide](https://docs.thatopen.com/contributing) first — it covers the code conventions we follow (JSDoc, examples, resources, etc.) so your changes sail through review.
+
 
 [npm]: https://img.shields.io/npm/v/@thatopen/components
 [npm-url]: https://www.npmjs.com/package/@thatopen/components

packages/front/README.md

@@ -72,6 +72,10 @@ world.scene.setup();
 world.camera.controls.setLookAt(3, 3, 3, 0, 0, 0);
 ```
 
+## 🤝 Contributing
+
+Thinking of sending a PR? Awesome! Please read our [contributing guide](https://docs.thatopen.com/contributing) first — it covers the code conventions we follow (JSDoc, examples, resources, etc.) so your changes sail through review.
+
 
 [npm]: https://img.shields.io/npm/v/@thatopen/components
 [npm-url]: https://www.npmjs.com/package/@thatopen/components