MCP Support

Add support for MCP (Model Context Protocol) so that AI chat applications like Claude Desktop can query, save and explore a users personal set of recipes.

This would allow queries in a chat interface like:

"find me a quick dinner using chicken and peppers in Stashcook"
"save this in Stashcook <link to recipe>"
"<previous chat messages include details about a recipe you have created with a chatbot> add this recipe we have just created to Stashcook and call it My Amazing Chilli and Salsa recipe"