Adding a basic mechanism to choose overlays (not operational yet)

src/i18n/en.ts

@@ -2,6 +2,9 @@ const dict = {
   close: 'close',
 
   chooseYourMap: 'Choose your map',
+  baseLayer: 'Base layer',
+  overlay: 'Overlay',
+  hiking: 'Hiking',
 
   nearby: 'Nearby',
 

src/i18n/fr.ts

@@ -4,6 +4,9 @@ const dict = {
   close: 'quitter',
 
   chooseYourMap: 'Choisissez votre carte',
+  baseLayer: 'Fond de carte',
+  overlay: 'Sur couche',
+  hiking: 'Randonnée',
 
   nearby: 'À proximité',