PICTURE in POI : let display a bigger picture for specific POI (outside the map)

[JLZIMMERMANN]

IDEA :
In some maps several contextual informations are needed, this is why we may add some picture outside the map to let understand who can be involved (or any other kind of explanation).

https://umap.incubateur.anct.gouv.fr/fr/map/sare-en-vaucluse-2024_410#10/44.0585/5.1787

SOLUTION :
When a POI is used with such choice an option would be welcome to let add like in the left panel
{{https://toulourenc-horizons.org/wp-content/uploads/2019/12/logo-chambre-metiers-artisanat-paca.jpg.webp|200}}
but this option is in the POI : bigget text ( #1884 ) and bigger image

[yohanboniface]

This needs custom icons (#125) and changing icon size (#859)