Support .env and open api 3

improve

• support open api 3
• move api key to .env file, make config easy
• update doc

Add api and folder sort support

improve

1. add api and folder sort support
2. use pinyin for chinese sort

Thanks to GitHub - hotoo/pinyin: 汉字拼音 ➜ hàn zì pīn yīn

Stable release after test for a long time

1. remove json-merger and merge json mannually