labels : give more options to let read better

[JLZIMMERMANN]

IDEA : In some maps whe may need to display different kind of labels. In the same map same labels are more important. https://umap.incubateur.anct.gouv.fr/fr/map/fr84-donnees-pdh-2024-04_319#11/44.0197/4.9871

SOLUTION : Some would be bold and others normal, or a little smaller.