Request support multiple schemas

[semdy]

Description

Like this:

export default [
{
  input: 'https://get.heyapi.dev/hey-api/backend',
  output: 'src/client',
  plugins: ['@hey-api/client-fetch'],
},
{
  input: 'https://get.heyapi.dev/hey-api/backend2',
  output:'src/client2',
  plugins: ['@hey-api/client-fetch'],
}
];