Add SpotlightAndAmbient parsing

KeepersCompound.LGS/Database/File.cs

@@ -166,6 +166,7 @@ public class DbFile
             "P$AnimLight" => new PropertyChunk<PropAnimLight>(),
             "P$LightColo" => new PropertyChunk<PropLightColor>(),
             "P$Spotlight" => new PropertyChunk<PropSpotlight>(),
+            "P$SpotAmb" => new PropertyChunk<PropSpotlightAndAmbient>(),
             "P$RenderAlp" => new PropertyChunk<PropFloat>(),
             "LD$MetaProp" => new LinkDataMetaProp(),
             _ when entryName.StartsWith("L$") => new LinkChunk(),

KeepersCompound.LGS/Database/ObjectHierarchy.cs

@@ -103,6 +103,7 @@ public class ObjectHierarchy
         AddProp<PropAnimLight>("P$AnimLight");
         AddProp<PropLightColor>("P$LightColo");
         AddProp<PropSpotlight>("P$Spotlight");
+        AddProp<PropSpotlightAndAmbient>("P$SpotAmb");
     }
 
     // TODO: Work out if there's some nice way to automatically decide if we inherit