Project: esmodule
Task (challenging): Write content `{"zh":1}` to 'modules/data/zh.json', `{"en":1}` to 'modules/data/en.json', `{"fr":1}` to 'modules/data/fr.json'. Dynamically import all the modules under 'modules/data/', merge all the data to an object 'data' and call `log('data', JSON.stringify(data))` in 'index.js'.