Add "Next Steps" to Aspire Template Creation

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

After the user creates a new Aspire project from a template it would be good to let them know what to do next. If they hit F5, they are presented with the option to run C#, which makes sense, but then they are presented with option to run all of the projects in the solution, and it may not be apparent that they need to run the AppHost project, especially for new users.

### Describe the solution you'd like

Suggest adding a launch.json with the AppHost Default Configuration wired up. Or a "Next Steps" md file that can help them through that. Also, recommend adding that they will likely need to close down all browsers after installing the dev cert.

### Additional context

_No response_