Seperate merge script from process_data script (#19)
* Move merge code to seperate script
* Reduce the number of parameters for merge script
* Remove level and add TODO to find a way to add it automatically
* Remove json_keys as well
* Trim away last json_keys
* Woops
* Fomatting + add comment
* typo
Co-authored-by: Thomas <รถ95242+thomasw21@users.noreply.github.com>
