Add MCP server (stdio + HTTP) reusing the skill's Graph client

New mcp-server/ exposes SharePoint Lists as MCP tools (test, list_lists, get_columns, list_items, get_item, create/update/delete_item) via the same graph.mjs core. Supports stdio (Claude Desktop/Code/Cowork) and Streamable HTTP (--http). SP_READONLY gates write tools. Adds project .mcp.json and ignores build artifacts. Verified end-to-end live over stdio and HTTP initialize.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

mcp-server/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "sharepoint-lists-mcp",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module",
+  "description": "MCP server for Microsoft SharePoint Lists (app-only Microsoft Graph auth)",
+  "bin": {
+    "sharepoint-lists-mcp": "index.mjs"
+  },
+  "scripts": {
+    "start": "node index.mjs",
+    "start:http": "node index.mjs --http"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.12.0",
+    "express": "^4.21.0",
+    "zod": "^3.23.8"
+  }
+}