feat: add update check

package.json

@@ -25,6 +25,7 @@
     "@oclif/plugin-not-found": "^3.2.8",
     "@oclif/plugin-plugins": "^5",
     "@oclif/plugin-version": "^2.2.5",
+    "@oclif/plugin-warn-if-update-available": "^3.1.11",
     "ansi-colors": "^4.1.3",
     "ansis": "^3.2.0",
     "better-sqlite3": "^11.1.2",
@@ -95,6 +96,10 @@
     "pluginPrefix": "ai-plugin",
     "theme": "theme.json",
     "topicSeparator": " ",
+    "warn-if-update-available": {
+      "timeoutInDays": 7,
+      "message": "<%= config.name %> update available from <%= chalk.yellowBright(config.version) %> to <%= chalk.yellowBright(latest) %>.\nRun <%= chalk.greenBright('npm install -g ' + config.name) %> to update."
+    },
     "repositoryPrefix": ""
   },
   "scripts": {