Snowflake example app

There are all kinds of great uses for the Snowflake Snowpark library. It would be great to have an example app which made use of that integration for two main reasons:

1. It's a really good example of why an R shiny user might be interested in the Python library.
2. There are great Stremlit apps which make use of Snowflake, but I believe they all use Snowflake packages which are available to Shiny. It's possible that Shiny might do a better job because reactive execution might minimize calls to expensive Snowflake operations.