Feature request - add template to existing project

[aaronpowell]

I'm working on a project that already uses azd to manage the environment, and I'm adding a new component to the project.

This new component will bring in a database, container app backend and SWA frontend, all from an existing template.

While it's possible to manually copy in the Bicep files and update the azure.yaml to include these new services, I'd like a way to use azd to incorporate it, something like:

azd add --template https://github.com/...

This command would:

• Download the template from the provided location
• Update the azure.yaml with the new services that the template defines
• Provide guidance on how to add the new services to the resources.bicep file (or automatically add them, if that's possible)

After that is done, the standard azd commands for provisioning, deploying and environment refresh would work as expect.

[savannahostrowski]

I think that this will be handled via some of the composability work we have scoped in a semester or two. Moving to Germanium

[rajeshkamal5050]

Marking this as a duplicate of #2386