show an UI error when user doesn't have an initial gee folder

[dfguerrerom]

Some apps that require GEE fail because users have not created the initial folder in GEE, that's was pointed and fixed in the package backed with #826, this, however let the user start any module created with sepal_ui and the error can happen anywhere, sometiemes there's no an alert that captures this event and therefore users won't see what is wrong.

I think we should add a new parameter to one of the components of the UI, such as App, like require_gee ... If that's valid, we could instead try the init_ee function and just display an error page with the error and how to fix it.