feat(brain): @mosaic/brain structured data service (#11)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

packages/brain/package.json

@@ -0,0 +1,45 @@
+{
+  "name": "@mosaic/brain",
+  "version": "0.1.0",
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "bin": {
+    "mosaic-brain": "./dist/index.js"
+  },
+  "exports": {
+    ".": {
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    }
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "dev": "tsx watch src/index.ts",
+    "start": "node dist/index.js",
+    "typecheck": "tsc --noEmit",
+    "lint": "echo 'ok'",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.12.1",
+    "@mosaic/types": "workspace:*",
+    "fastify": "^5.3.3",
+    "proper-lockfile": "^4.1.2",
+    "zod": "^3.24.4"
+  },
+  "devDependencies": {
+    "@types/node": "^22",
+    "@types/proper-lockfile": "^4",
+    "tsx": "^4",
+    "typescript": "^5",
+    "vitest": "^3"
+  },
+  "publishConfig": {
+    "registry": "https://git.mosaicstack.dev/api/packages/mosaic/npm",
+    "access": "public"
+  }
+}