Docs: suggest adding "Discover MCP servers" link (registry + RAGMap)

[khalidsaidi]

Suggestion

The Inspector README explains how to run and configure servers, but developers new to MCP may not know where to find servers to test. Adding a short "Discover MCP servers" (or "Try these servers") section could help.

Proposed addition (e.g. after Quick Start or in a new subsection):

• MCP Registry — official list of published MCP servers.
• RAGMap — RAG-focused subregistry: search by meaning or keywords, filter by transport/category, get explainable scores. Useful for finding retrieval-related servers to test in the Inspector (e.g. browse, copy a streamable-http URL and paste into Inspector).

I can open a small PR that adds this subsection to the README if maintainers are open to it.