API for GraphQL - Expose Existing Views from Lakehouse and Warehouse

Summary
Enable the Fabric GraphQL API to include existing views (and optionally materialized views) in the schema introspection and schema editor so they can be queried like tables.

Problem

Currently, the GraphQL schema only surfaces tables and procedures. If you rely on views for semantic modeling, they are invisible to GraphQL clients. This forces developers to:

• Query underlying tables directly (breaking abstraction).
• Duplicate logic in client queries or ETL scripts.
• Lose governance and lineage visibility for views.

Proposal

• Include views in the GraphQL schema introspection.
• Expose metadata (name, schema, etc).
• Allow querying views with the same syntax as tables (possibly highlight that they're not tables in the editor ui?)