[wakatime] transform the data into cpp
[wakatime] transform the data into cpp

- it is already done in python
- store in a columnar format (because it is easier, otherwise I need to
turn data into raw bytes)
- it is not very efficient to use container like vector and string, databases use raw bytes
  - but let's just have sth up and running first

at15/ts-parallel,at15/ts-parallel