Move HighwayTypes from Pathfinding to here

OSM_Graph/Enums/HighwayType.cs

@@ -0,0 +1,36 @@
+// ReSharper disable InconsistentNaming
+// ReSharper disable UnusedMember.Global
+namespace OSM_Graph.Enums;
+
+public enum HighwayType
+{
+    NONE,
+    motorway,
+    trunk,
+    primary,
+    secondary,
+    tertiary,
+    unclassified,
+    residential,
+    motorway_link,
+    trunk_link,
+    primary_link,
+    secondary_link,
+    tertiary_link,
+    living_street,
+    service,
+    pedestrian,
+    track,
+    bus_guideway,
+    escape,
+    raceway,
+    road,
+    busway,
+    footway,
+    bridleway,
+    steps,
+    corridor,
+    path,
+    cycleway,
+    construction
+}