Expected layout and structure of Azure storage accounts should be documented

[rtyler]

In order to use Delta Lake and Azure, the library expects the storage account to be configured with Azure Delta Lake Service Gen2 enabled, which is a non-default setting.

Some README or user-guide type documentation on how a Delta Table(s) should look in Azure, including the Azure configuration, would be beneficial for us to include!

[drahnreb]

Highly appreciated if this is documented. I haven't looked into the Rust code, but from a python perspective this is very opaque.

[roeap]

With the adoption of object_store, we now use the blob api throughout, which is supported by Gen1 and Gen2 accounts. We do retain the if_not_exists functionality of course :).