feat: implement MCP server plugin v1.0.0

Add HTTP-based MCP server exposing 20 Joplin tools (notes, notebooks,
tags, search) via StreamableHTTPServerTransport. Includes configurable
host/port settings, CORS support, and session management.

- src/index.ts: Plugin registration and settings UI
- src/server.ts: MCP HTTP server with StreamableHTTP transport
- src/tools.ts: 20 MCP tool definitions for Joplin operations
- LICENSE: MIT license
- CHANGELOG.md: v1.0.0 changelog entry
- README.md: Comprehensive documentation

package-lock.json

@@ -10,7 +10,7 @@
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.29.0",
-        "zod": "^4.4.3"
+        "zod": "^3.25.0"
       },
       "devDependencies": {
         "@types/node": "^18.7.13",
@@ -2716,9 +2716,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "4.4.3",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
-      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }