Trying to add column with city names in dataframe based on columns that contains longitude and latitude/ or spatial join with shp file?

Question

I have a csv file with 2 columns which contain long and lat location, but there is not one column wheres the city name is specified. To do so, I use python and I want to make a spatial join with a shp/shx file with every city from France.

The csv file looks like that :

index,date,position,long,lat,

421589,2020-08-06T10:35,48.491867 -1.5816984,48.491867,-1.5816984

Geo file :

https://wxs.ign.fr/x02uy2aiwjo9bm8ce5plwqmr/telechargement/prepackage/ADMINEXPRESS_SHP_TERRITOIRES_PACK_2022-11-21$ADMIN-EXPRESS_3-1__SHP_LAMB93_FXX_2022-11-21/file/ADMIN-EXPRESS_3-1__SHP_LAMB93_FXX_2022-11-21.7z

Does someone know to do so ?

Have a good day ! :)