feat: add hosting config files

[RonithManikonda]

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[AriPerkkio]

Great start @RonithManikonda! 💯

Some comments below. Also the test are currently stuck as there is no default value for this new option. The tests are using --defaults which skips all prompts and uses default values. You can test this CLI manually by running:

$ cd packages/cli
$ pnpm build
$ node ./dist/index.js create example

# Or to see how tests are using this, see packages/cli/tests/create-tutorial.test.ts
$ node ./dist/index.js create example --no-git --no-install --no-start --defaults

[AriPerkkio]

Tests and build are now passing, nice!

I've added couple of notes below. In addition to those, let's add some test cases in packages/cli/tests/create-tutorial.test.ts. You can run these tests with pnpm run test when in packages/cli directory.

For each provider, add a test case that builds the project and checks that it generated the expected hosting file. Here's and example for Netlify:

test('create a project with Netlify as provider', async (context) => {
  const name = context.task.id;
  const dest = path.join(tmpDir, name);

  await execa('node', [cli, 'create', name, '--no-install', '--no-git', '--defaults', '--provider', 'netlify'], {
    cwd: tmpDir,
  });

  const projectFiles = await fs.readdir(dest, { recursive: true });
  expect(projectFiles).toContain('netlify.toml');
});

And for Cloudflare's case we'll also need to check that package.json contains the postbuild script:

const packageJson = await fs.readFile(`${dest}/package.json`, 'utf8');
const json = JSON.parse(packageJson);

expect(json).toHaveProperty('scripts');
expect(json.scripts).toHaveProperty('postbuild');
expect(json.scripts.postbuild).toBe('cp _headers ./dist/');