feat: add brain refresh command

src/oclif/commands/brain/refresh.ts

@@ -0,0 +1,23 @@
+import { upgradeBrains } from '../../../lib/brain.js'
+import { AICommand } from '../../lib/ai-command.js'
+import { showBanner } from '../../lib/help.js'
+
+export default class AIBrainRefreshCommand extends AICommand {
+  static summary = '🔄 refresh online brains.'
+
+  static description = 'refresh brain index from huggingface.co'
+  async run(): Promise<any> {
+    const opts = await this.parse(AIBrainRefreshCommand)
+    const isJson = this.jsonEnabled()
+    const {flags} = opts
+    const userConfig = this.loadConfig(flags.config, opts)
+    await this.config.runHook('init_tools', {id: 'brain', userConfig})
+
+    if (userConfig.banner && !isJson) {showBanner('Refresh Brains')}
+
+    const count = await upgradeBrains(flags)
+    this.log(`${count} brains updated`)
+
+    return count
+  }
+}