[Feature]: iife format type no bundle name config ？

[FeSeason]

What problem does this feature solve?

use iife format type, but no output library name config.

What does the proposed API look like?

hope api config such as [name] config in buildConfig:

{
      format: 'iife',
      target: 'es6',
      outDir: './dist/iife',
      name: 'appLibName',
},

[10Derozan]

You can use global-name by esbuildOptions