Script to generate dataset nucleus: transition to clean energy

[ofrancon]

Assemble a "Transition to clean energy" dataset.
Write a script to generate a "core" dataset that can be further extended.
It should be possible to persist the generated dataset to a .csv file.
1 row should correspond to one country or region, and a date
We're aiming for quarterly data points, if possible.
Data itself should NOT be checked in into this repo. Only the script(s) that assemble it should be checked in.