Add system-monitor-server example

Demo MCP App showcasing real-time OS metrics visualization with:
- Per-core CPU usage via stacked area chart (Chart.js)
- Memory usage bar gauge with color-coded thresholds
- Auto-polling at 2-second intervals
- Light/dark theme support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

package-lock.json

@@ -160,6 +160,27 @@
         "vite-plugin-singlefile": "^2.3.0"
       }
     },
+    "examples/system-monitor-server": {
+      "version": "1.0.0",
+      "dependencies": {
+        "@modelcontextprotocol/ext-apps": "../..",
+        "@modelcontextprotocol/sdk": "^1.22.0",
+        "chart.js": "^4.4.0",
+        "systeminformation": "^5.27.11",
+        "zod": "^3.25.0"
+      },
+      "devDependencies": {
+        "@types/cors": "^2.8.19",
+        "@types/express": "^5.0.0",
+        "@types/node": "^22.0.0",
+        "concurrently": "^9.2.1",
+        "cors": "^2.8.5",
+        "express": "^5.1.0",
+        "typescript": "^5.9.3",
+        "vite": "^6.0.0",
+        "vite-plugin-singlefile": "^2.3.0"
+      }
+    },
     "node_modules/@babel/code-frame": {
       "version": "7.27.1",
       "dev": true,
@@ -471,6 +492,12 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@kurkle/color": {
+      "version": "0.3.4",
+      "resolved": "https://registry.npmjs.org/@kurkle/color/-/color-0.3.4.tgz",
+      "integrity": "sha512-M5UknZPHRu3DEDWoipU6sE8PdkZ6Z/S+v4dD+Ke8IaNlpdSQah50lz1KtcFBa2vsdOnwbbnxJwVM4wty6udA5w==",
+      "license": "MIT"
+    },
     "node_modules/@modelcontextprotocol/ext-apps": {
       "resolved": "",
       "link": true
@@ -1344,6 +1371,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/chart.js": {
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-4.5.1.tgz",
+      "integrity": "sha512-GIjfiT9dbmHRiYi6Nl2yFCq7kkwdkp1W/lp2J99rX0yo9tgJGn3lKQATztIjb5tVtevcBtIdICNWqlq5+E8/Pw==",
+      "license": "MIT",
+      "dependencies": {
+        "@kurkle/color": "^0.3.0"
+      },
+      "engines": {
+        "pnpm": ">=8"
+      }
+    },
     "node_modules/check-error": {
       "version": "2.1.1",
       "dev": true,
@@ -2944,6 +2983,36 @@
         "url": "https://github.com/chalk/supports-color?sponsor=1"
       }
     },
+    "node_modules/system-monitor-server": {
+      "resolved": "examples/system-monitor-server",
+      "link": true
+    },
+    "node_modules/systeminformation": {
+      "version": "5.27.11",
+      "resolved": "https://registry.npmjs.org/systeminformation/-/systeminformation-5.27.11.tgz",
+      "integrity": "sha512-K3Lto/2m3K2twmKHdgx5B+0in9qhXK4YnoT9rIlgwN/4v7OV5c8IjbeAUkuky/6VzCQC7iKCAqi8rZathCdjHg==",
+      "license": "MIT",
+      "os": [
+        "darwin",
+        "linux",
+        "win32",
+        "freebsd",
+        "openbsd",
+        "netbsd",
+        "sunos",
+        "android"
+      ],
+      "bin": {
+        "systeminformation": "lib/cli.js"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      },
+      "funding": {
+        "type": "Buy me a coffee",
+        "url": "https://www.buymeacoffee.com/systeminfo"
+      }
+    },
     "node_modules/tinybench": {
       "version": "2.9.0",
       "dev": true,