feat: migrate to protomaps and maplibre

frontend/app/src/assets/i18n/de.json

@@ -276,7 +276,7 @@
     "page": {
       "TITLE": "Karte",
       "search_bar": {
-        "placeholder": "Gebäude, Points of Interest, Mensen und mehr"
+        "placeholder": "Diesen Bereich durchsuchen"
       },
       "buttons": {
         "SHOW_LIST": "Als Liste ansehen",

frontend/app/src/assets/i18n/en.json

@@ -276,7 +276,7 @@
     "page": {
       "TITLE": "Map",
       "search_bar": {
-        "placeholder": "Buildings, points of interests, canteens and more"
+        "placeholder": "Search this area"
       },
       "buttons": {
         "SHOW_LIST": "Show as list",