feat: add a clean script to cleanup build folders

Author: satya164

packages/create-react-native-library/templates/common/$package.json

@@ -33,7 +33,8 @@
     "prepare": "bob build",
     "release": "release-it",
     "example": "yarn --cwd example",
-<% if (example == 'native') { -%>
+<% if (example === 'native') { -%>
+    "clean": "del-cli android/build example/android/build example/android/app/build example/ios/build",
     "bootstrap": "yarn example && yarn install && yarn example pods"
 <% } else { -%>
     "bootstrap": "yarn example && yarn install"
@@ -63,6 +64,7 @@
     "@types/react": "~17.0.21",
     "@types/react-native": "0.70.0",
     "commitlint": "^17.0.2",
+    "del-cli": "^5.0.0",
     "eslint": "^8.4.1",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-prettier": "^4.0.0",

packages/create-react-native-library/templates/common/CONTRIBUTING.md

@@ -50,6 +50,12 @@ By default, the example is configured to build with the old architecture. To run
    yarn example ios
    ```
 
+If you are building for a different architecture than your previous build, make sure to remove the build folders first. You can run the following command to cleanup all build folders:
+
+```sh
+yarn clean
+```
+
 <% } -%>
 <% if (project.architecture === 'new' || project.architecture == 'mixed') { -%>
 To confirm that the app is running with the new architecture, you can check the Metro logs for a message like this: