[michaelelrom]

Summary

• Adds an Azure Resource Manager Integration Model (OpenAPI 3.0, native OAuth2 client credentials against Microsoft Entra ID), curated to 32 operations across Resource Groups, Resources, Providers, Tags, Deployments, Deployment Operations, and Subscriptions/Tenants, plus the three full upstream Resources/Deployments/Subscriptions specs.
• Adds a companion Studio Project with 32 workflows (one per curated operation) across 7 folders.
• Updates the root README Vendor Index to list Azure Resource Manager under Microsoft.

Test plan

• Validated the curated spec with openapi-spec-validator
• Imported the curated spec into a local Itential Platform via POST /integration-models
• Created an integration instance from the model
• Imported the Studio Project via POST /automation-studio/projects/import (insert-new) — all 32 workflows imported cleanly