Promote the Ducks library

[huan]

to let other developers inspect this convenience module and collect feedbacks.

Links:

• https://randycoulman.com/blog/2016/09/27/modular-reducers-and-selectors/
• https://www.producthunt.com/posts/ducks
• https://news.ycombinator.com/item?id=30146823
• https://www.reddit.com/r/programming/comments/sgyyxi/reducer_bundles_manager_for_redux_implemented_the/

TODO:

• comment https://www.freecodecamp.org/news/scaling-your-redux-app-with-ducks-6115955638be/
• comment https://www.youtube.com/watch?v=jr7D4VAzNig&t=960s