changes.create()

import { Buffer } from 'node:buffer';

const change = await mesa.changes.create({
  repo: 'app',
  base_change_id: 'zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz',
  message: 'Add README',
  author: { name: 'Docs Bot', email: 'docs@example.com' },
  files: [
    {
      path: 'README.md',
      content: Buffer.from('# App\n').toString('base64'),
    },
    { path: 'old.txt', action: 'delete' },
  ],
});