Warn when results are truncated in Search-AzGraph
Currently, when a you run a query via Search-AzGraph but don't specify the -First parameter, the results are limited to the first 100 items (see https://github.com/Azure/azure-powershell/blob/master/src/ResourceGraph/ResourceGraph/Cmdlets/SearchAzureRmGraph.cs for source code details).
Whilst the reasoning behind limiting the results is fully understood (a select everything across all subscriptions is obviously going to return a large result set!) it should at very least result in a warning when results are truncated.
As a secondary but related suggestion, I would also like to see the same warning be surfaced when the -First parameter is supplied but the result set is larger than the chosen value.