docs: Add section about MCP servers with external agents (#40658)
Adding this content after seeing people ask about how to make MCP
servers installed from Zed be picked up by external agents. At the
moment, this varies depending on the agent, and felt relevant to be
documented.
Release Notes:
- N/A
9a3c7945a9Danilo Leal committed on 10/20/2025, 12:11:11 PM· committed by GitHubparentcc21089