feat: manage Chromium installation in engine

scripts/install-browser.ts

@@ -0,0 +1,18 @@
+import { spawn } from 'node:child_process'
+import { createBrowserInstallCommand } from './lib/browser-install.ts'
+
+const { command, args } = createBrowserInstallCommand(process.argv.slice(2))
+const child = spawn(command, args, { stdio: 'inherit' })
+
+child.once('error', (error) => {
+  console.error(`无法启动 Chromium 安装程序：${error.message}`)
+  process.exitCode = 1
+})
+
+child.once('exit', (code, signal) => {
+  if (signal) {
+    process.kill(process.pid, signal)
+    return
+  }
+  process.exitCode = code ?? 1
+})