Add CI workflow to publish and build apps for production

[iaacosta]

Now, the generated project's CircleCI config publishes the app to the default release channel on master branch merges.

We generally use a staging / production deployment flow, so at least the app should publish to the staging release channel on merges to master and to the production release channel on merges to production. This shouldn't be asked to the user.

Additionally, we should ask the user if he wants to send the cloud instruction to Expo to build the .ipa and .aab binaries after publishing the production app.

All of these configurations should be written in the CircleCI config file