feat: add ability to generate a local library

[satya164]

Summary

Currently, when we have local native modules and views, they become part of the android & ios source code, this makes upgrading the project to a newer React Native version harder as we also need to consider those changes.

This change lets us create a local library which is not part of the android & ios folders, but a separate directory in the repo, making it self contained. It also adds a new --no-example flag to generate the project without example.

More details in this RFC: react-native-community/discussions-and-proposals#702

How it works

• If we detect a package.json in the current folder, we ask user whether they want to create a local library
• If the project is a react-native project, we add entries to package.json based on the package manager to link the native library (which creates a symlink in node_modules)
• If the project is not a react-native project, we don't modify package.json, but ask user to link based on the project setup - this is relevant for monorepo scenario

Test plan

• Create a new project with npx react-native init
• Run create-react-native-library in the project to create a local library
• Import the library in App.tsx and use the exported method to verify functionality
• Install dependencies and pods, then run the app on Android & iOS to verify that it works

Kapture.2023-09-22.at.17.00.37.mp4