[improve] national id package layout

[microdataxyz]

Which module would you want to improve? Please give us the link to the source. One example is enough the whole national id

Describe the solution you'd like I would like to layout the code structure to be more python style:

1. add packages for each country with the lowercase of 3-digit iso-codes
2. separate each id as a standalone module
3. use the uppercase 3-digit iso-code as the quick access module

Additional context N/A