Improve discovery of Code Suggestions

Code suggestions require a number of steps to setup. End users aren't even aware when their group admins enable it.

We should improve end-user discovery of Code Suggestions.

Requirements

• group-setting for code suggestions is enabled
• given setting is specific to a project, show something within the project UI to alert end-users to the availability of code suggestions.
• display promotion to use code suggestions with link to documentation and maybe quick start video.

Challenges with this proposal

• we don't know if a specific user is using VS Code
• there isn't a natural place to alert a user to this capability