Migrate the map editor to mapbox-gl with react component

app/javascript/components/MapEditor/utils.js

@@ -0,0 +1,18 @@
+export const ERROR_GEO_JSON = '';
+export const createFeatureCollection = selectionsUtilisateur => {
+  return {
+    type: 'FeatureCollection',
+    features: selectionsUtilisateur
+  };
+};
+
+export const polygonCadastresFill = {
+  'fill-color': '#EC3323',
+  'fill-opacity': 0.3
+};
+
+export const polygonCadastresLine = {
+  'line-color': 'rgba(255, 0, 0, 1)',
+  'line-width': 4,
+  'line-dasharray': [1, 1]
+};