[SUGGESTION] Add Transfer File Creation from CSV

[FerranMarin]

Is your feature request related to a problem? Please describe.
Transfer axies need a JSON file to be created, that can be a bit hard to create.

Describe the solution you'd like
Have a way to generate such JSON file via a CSV file.

Additional context
Other JSON files already have such helper functions.

[blanxii]

Quick win, I'll take it

[FerranMarin]

Added to main branch.