React types dependency version should be overwritten when generating React Typescript extensions

[alvaro-shopify]

WHY are these changes introduced?

Fixes #395

WHAT is this pull request doing?

• When generating a Typescript React extension, "@types/react": "17.0.30" dependency is add inside the resolutions or overrides block inside the root package.json of the app directory
• Depending on the package manager used to create the app, either resolution (yarn) or overrides (npm, pnpm) are set

How to test your changes?

• Run yarn shopify app generate extension
• Select checkout UI and Typescript React as flavor
• Open the app with VS Code and there should be no problems with React components resolution

Post-release steps

• Maybe there should be added some instructions for users that have generated Typescript React extensions without this dependency

Measuring impact

How do we know this change was effective? Please choose one:

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• Existing analytics will cater for this addition
• PR includes analytics changes to measure impact

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've made sure that any changes to dev or deploy have been reflected in the internal flowchart.