docs: update contributing references and formatting note

Author: thisislvca

CONTRIBUTING.md

@@ -63,6 +63,10 @@ Then run repository checks from the root:
 bun run pre-push
 ```
 
+## Formatting setup
+
+The formatting scripts intentionally call `node ./node_modules/prettier/bin/prettier.cjs` to avoid PATH/bin shadowing from transitive tooling (see [expo/expo#42994](https://github.com/expo/expo/issues/42994)).
+
 ## Plugin testing
 
 In addition to app/prebuild validation, config plugin regression tests are defined under:

README.md

@@ -581,7 +581,7 @@ For a complete implementation, see the [example app](https://github.com/Kingstin
 
 ## Contributing
 
-Contributions are very welcome! Please refer to guidelines described in the [contributing guide](https://github.com/expo/expo#contributing).
+Contributions are very welcome! Please refer to guidelines described in [`CONTRIBUTING.md`](./CONTRIBUTING.md).
 
 ### Repository development setup