Add browser endpoint

- not added to conditional exports yet

browser.mjs

@@ -0,0 +1,13 @@
+// Bootstrap cliui with esm dependencies:
+import { cliui } from './build/lib/index.js'
+import stringWidth from 'https://esm.sh/string-width@^6'
+import stripAnsi from 'https://esm.sh/strip-ansi@^7'
+import wrap from 'https://esm.sh/wrap-ansi@^8'
+
+export default function ui (opts) {
+  return cliui(opts, {
+    stringWidth,
+    stripAnsi,
+    wrap
+  })
+}