Sample Spark .NET notebook to read from Event Hubs

[Niharikadutta]

This notebook shows how to connect to an Event Hub, read the stream and process the messages using .NET for Apache Spark on Azure Synapse Analytics.

This notebook shows how to do the following:

• Read stream from Event Hubs
• Decompress gzip body
• Apply schema
• Apply stream processing
• (optional) Save to Delta table

[Niharikadutta]

@ruixinxu Could you please review this PR? Thanks!

[Niharikadutta]

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