Nest.IndicesStats should contain shard_stats reported by GET /index/_stats

[vkras]

Is your feature request related to a problem? Please describe.
GET /index/_stats returns shard_stats with total_count property for indices. But C# method ElasticClient.Indices.Stats(index) returns Nest.IndicesStats class where the shard_stats is not mapped.

Describe the solution you'd like
Map shard_stats API returns to C# object.

Describe alternatives you've considered
I have to made a second call to get this information from index settings (it's not ideal).

[stevejgordon]

Apologies for the delay @vkras. I'll take a look at this.

[stevejgordon]

Added in 7.15, so re-labelling this as a feature we will add.

[stevejgordon]

@vkras I've added this for the next release. Thanks for raising it.