New version of wikipedia_en_climate_change.

[mgautierfr]

Previous version had no xapian database. New version (mini variant) is :

• Smaller
• Contain a xapian db we can use to search in.

This is needed as we want to test we can search in zim file already created. For now, libzim test only search in zim file it has just created.

data/withns/wikipedia_en_climate_change_mini_2024-06.zim is downloaded from https://download.kiwix.org/zim/wikipedia/wikipedia_en_climate_change_mini_2024-06.zim

data/nons/wikipedia_en_climate_change_mini_2024-06.zim is generated from withns version by recreating it with zimrecreate version 3.4.2