Update documentation to allow console lines in development

**Is your feature request related to a problem? Please describe.**
Users are unable to use console log lines in development mode.

**Describe the solution you'd like**
Update the documentation to demostrate how a user can disable console lines only for production builds.

Example `babel.config.js`
```
module.exports = api => {
const babelEnv = api.env();
...
const plugins = [];
if (babelEnv !== 'development') {
plugins.push('transform-remove-console');
}
return {
presets: ['module:metro-react-native-babel-preset'],
plugins,
};
};
```

Locate the documentation covering transform-remove-console and Babel configuration. Add the provided babel.config.js pattern so console lines remain available in development but are removed for production builds, then verify the documentation clearly demonstrates that behavior.

Written by the indexing model from the issue text.