Reorganized routes definitions

backend/utils/merge_maps.go

@@ -0,0 +1,13 @@
+package utils
+
+func MergeMaps[K comparable, V any](maps ...map[K]V) map[K]V {
+	merged := make(map[K]V)
+
+	for _, m := range maps {
+		for k, v := range m {
+			merged[k] = v
+		}
+	}
+
+	return merged
+}