Add documentation for Azure Data Studio

[rrmistry]

Azure Data Studio and T-SQL support seems to be missing in this documentation.

For example:

• https://visualstudio.microsoft.com/services/intellicode/#tab-86e19ae5d0e070d2b45
• https://docs.microsoft.com/en-us/sql/azure-data-studio/release-notes-azure-data-studio?#november-2019

Would be nice to see it consistent across documentation sources

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Document Details

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• ID: 3064afb4-92b2-e9e4-2412-72abb73b8357
• Version Independent ID: 670cfa00-77ef-c6d8-74d2-f236fee6a572
• Content: Visual Studio IntelliCode
• Content Source: docs/overview.md
• Product: visual-studio-family
• Technology: intellicode
• GitHub Login: @gewarren
• Microsoft Alias: gewarren

[vivlimmsft]

@catycaldwell can you please take a look?