[Hubs] ADX guidance for SQL users

[flanakin]

⚠️ Problem

People who are new to ADX/KQL may prefer SQL due to familiarity.

🛠️ Solution

Add documentation to explain how to query with T-SQL and setup SQL Server emulation. Include examples. Consider adding an ADX dashboard with SQL examples (e.g., FOCUS use case library examples).

• https://learn.microsoft.com/azure/data-explorer/t-sql
• https://learn.microsoft.com/azure/data-explorer/sql-server-emulation-overview

🙋‍♀️ Ask for the community

We could use your help:

1. Please vote this issue up (👍) to prioritize it.
2. Leave comments to help us solidify the vision.