Add Execute Streamlit command for running Streamlit apps

[sfc-gh-vmaleki]

Pre-review checklist

• I've confirmed that instructions included in README.md are still correct after my changes in the codebase.
• I've added or updated automated unit tests to verify correctness of my new code.
• I've added or updated integration tests to verify correctness of my new code.
• I've confirmed that my changes are working by executing CLI's commands manually on MacOS.
• I've confirmed that my changes are working by executing CLI's commands manually on Windows.
• I've confirmed that my changes are up-to-date with the target branch.
• I've described my changes in the release notes.
• I've described my changes in the section below.

Changes description

• Implemented the execute command for running Streamlit apps in headless mode
  using snow streamlit execute <app-name>.
• After execution, you can get the app URL by using snow streamlit get-url <app-name> --open and open it in your browser.
• Wrote unit tests for the execute command, following the pattern used for notebooks.
• Updated the Streamlit manager to support execution.

[sfc-gh-turbaszek]

Can you please add integration test?

[sfc-gh-astus]

Usually we return message from Snowflake, in your case, what message is returned?

[sfc-gh-vmaleki]

After running snow execute streamlit my-app the message was Streamlit my-app executed..