Mention just-mcp in readme (#2843)

Author: casey

README.md

@@ -600,6 +600,12 @@ The [zed-just](https://github.com/jackTabsCode/zed-just/) extension by
 Feel free to send me the commands necessary to get syntax highlighting working
 in your editor of choice so that I may include them here.
 
+### Model Context Protocol
+
+[just-mcp](http://github.com/promptexecution/just-mcp) provides a
+[model context protocol](https://en.wikipedia.org/wiki/Model_Context_Protocol)
+adapter to allow LLMs to query the contents of `justfiles` and run recipes.
+
 Quick Start
 -----------