Add documentation for configurable AZD template sources

[wbreza]

Today there isn't any public documentation for AZD template sources.

• Adds docs for the expected template source schema
• Add examples for adding/removing template sources
• Add special notes about the automatic devcenter template source when devcenter mode is enabled.

Template sourcess can be managed via the azd template source command group

[alexwolfmsft]

@wbreza or @gkulin do you have more information on these features somewhere? The only information I have is documented on the reference page https://learn.microsoft.com/en-us/azure/developer/azure-developer-cli/reference#azd-template

For example, I'm not sure what these mentioned features are:

Adds docs for the expected template source schema Add special notes about the automatic devcenter template source when devcenter mode is enabled.

[wbreza]

@alexwolfmsft - here is PR for the template sources feature. Happy to sync up if you need more information.

Template Sources https://github.com/Azure/azure-dev/pull/2573

Dev Center Features https://github.com/Azure/azure-dev/pull/2767

[alexwolfmsft]

@wbreza thanks for that information. We do have this current doc that goes into dev center support: https://learn.microsoft.com/en-us/azure/developer/azure-developer-cli/ade-integration

I think we should add a new doc that talks about the template source feature more generally, and then expanding that ADE integration doc with anything that's missing for that specific feature set - does that work for you?

[gkulin]

completed here: https://learn.microsoft.com/en-us/azure/developer/azure-developer-cli/configure-template-sources