Add AddSearchIndexerClient Extension Method for Azure AI Search

[xantari]

Library name

Azure.Core.Extensions

Please describe the feature.

Currently you only have registration methods for AddSearchIndexClient and AddSearchClient.

It would be helpful to also add AddSearchIndexerClient to this: https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/search/Azure.Search.Documents/src/SearchClientBuilderExtensions.cs

builder.AddClient<SearchIndexerClient, SearchClientOptions>((opts) =>
{
    return new SearchIndexerClient(new Uri(config.SearchServiceUrl), new AzureKeyCredential(config.SearchServiceQueryApiKey));
});

The above is the current work around (not the end of the world, but you had extension methods for the other client registrations so I wouldn't see why you wouldn't add this one as well.

[github-actions]

Thank you for your feedback. Tagging and routing to the team member best able to assist.

[pallavit]

@jsquire do we have a criteria on deciding when to add extensions for clients across our SDKs?

[jsquire]

@jsquire do we have a criteria on deciding when to add extensions for clients across our SDKs?

@pallavit: General guidance has been that we should have an extension to register every top-level client exposed by a library, unless they have special needs for use/lifetime management where passing them around doesn't make sense.

[pallavit]

It may be worth having a static analyzer for this then - we may have a few gaps in our SDKs.
/cc: @m-nash do we have this added to the DPG generator i.e. we create an extension for each builder?