Add EMA references

EMA/ID-JAGs allow centralized authorization, moves decision making from MCP users to company administrators, and gives some (albeit imperfect) centralized visibility. Worth a mention - and I'm happy to contribute if this would be a fit. I have been building POCs of this lately to prove it out, and some identity vendors like Okta have it in beta. So it's early but very promising and solves a number of real problems

https://blog.modelcontextprotocol.io/posts/enterprise-managed-auth/

Here's a walkthrough https://github.com/Zenable-io/labs/blob/main/labs/ema-mcp/README.md

I imagine a technical walkthrough isn't a fit for this project but I found a handful of places where it seems like at least a mention would be appropriate

Start by reading the linked EMA/ID-JAG blog post and walkthrough, then inspect the repository’s existing governance documentation for sections where centralized authorization or administrator decision-making belongs. Confirm the appropriate scope with maintainers before adding concise references, and consider the work done when the relevant sections link to accurate EMA material without expanding into a technical walkthrough.