feat(Core/LOS): restruct LOS functions and add LineOfSight check (#1459)

src/server/worldserver/worldserver.conf.dist

@@ -318,6 +318,15 @@ vmap.enableIndoorCheck = 1
 
 DetectPosCollision = 1
 
+#
+#    CheckGameObjectLoS
+#        Description: Include dynamic game objects (doors, chests etc.) in line of sight checks.
+#                     This increases CPU usage somewhat.
+#        Default:     1 - (Enabled)
+#                     0 - (Disabled, may break some boss encounters)
+
+CheckGameObjectLoS = 1
+
 #
 #    TargetPosRecalculateRange
 #        Description: Max distance from movement target point (+moving unit size) and targeted