Add docs for Whats new in 0.11

[Aniruddh25]

Similar to https://learn.microsoft.com/en-us/azure/data-api-builder/whats-new/version-0-10#whats-new-in-version-010, we need a page for 0.11 with the following salient features:

1. Complete GraphQL support for SQL Data Warehouse as a supported database type listed as `dwsql`
   

2. Enhanced CosmosDB GraphQL Filtering – support for nested filters, Id variables, string array search with contains operator
3. Use CLI to enable telemetry collection via app insights

[seesharprun]

We have a what's new for 1.1: https://learn.microsoft.com/en-us/azure/data-api-builder/whats-new/version-1-1

But, we missed a "what's new for 0.11"

That can be published ASAP (later this week).

[seesharprun]

This content will be published later today.