Add jsx-transform support to extensions build

[faouzioudouh]

Trying to resolve this issue
This is my first PR here, if the fix is not enough/wrong feel free to direct me to the proper way to handle it.

WHY are these changes introduced?

React 17 has support for jsx without explicit React import, we want to have the same experience when building checkout extensions

WHAT is this pull request doing?

Added automatic option for esbuild options, to allow auto import of React
More details: https://esbuild.github.io/api/#jsx

How to test your changes?

• Create an checkout extension
• choose typescript-react template
• Observe tsconfig.json file is generated
• Make sure react is not imported in your component files
• After building/deploying make sure you don't see React not defined error in your console

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.

[github-actions]

We detected some changes at packages/*/src and there are no updates in the .changeset.
If the changes are user-facing, run "yarn changeset add" to track your changes and include them in the next release CHANGELOG.

[misha-reyzlin-shopify]

🎩 'd with development store, works great! 🚀

[jamesvidler]

Nicely done! I tophatted this as well by deploying to my prod development store.

[lemonmade]

Thank you so much for doing this!