fix(agent-toolkit): Move @modelcontextprotocol/sdk to dependencies

We need it so that `npx @clerk/agent-toolkit` finds the correct dependencies, as peer deps are not installed by default. We might want to vendor it in the future, once the pkg name is finalized.

Author: nikosdouvlis

.changeset/brown-trees-film.md

@@ -0,0 +1,5 @@
+---
+'@clerk/agent-toolkit': patch
+---
+
+Fix npx @clerk/agent-toolkit by moving `@modelcontextprotocol/sdk` in `dependencies`

packages/agent-toolkit/package.json

@@ -48,24 +48,21 @@
     "@clerk/backend": "workspace:^",
     "@clerk/shared": "workspace:^",
     "@clerk/types": "workspace:^",
-    "yargs": "^17.7.2",
+    "@modelcontextprotocol/sdk": "1.7.0",
+    "yargs": "17.7.2",
     "zod": "3.24.2"
   },
   "devDependencies": {
     "@types/yargs": "^17.0.33"
   },
   "peerDependencies": {
     "@langchain/core": "^0.3.6",
-    "@modelcontextprotocol/sdk": "^1.4.1",
     "ai": "^3.4.7 || ^4.0.0"
   },
   "peerDependenciesMeta": {
     "@langchain/core": {
       "optional": true
     },
-    "@modelcontextprotocol/sdk": {
-      "optional": true
-    },
     "ai": {
       "optional": true
     }