feat(autoware_adapi_v1_msgs): add route change option

Signed-off-by: Takagi, Isamu <[email protected]>

autoware_adapi_v1_msgs/routing/msg/RouteOption.msg

@@ -1 +1,5 @@
+# Please refer to the following pages for details on each option.
+# https://autowarefoundation.github.io/autoware-documentation/main/design/autoware-interfaces/ad-api/features/routing/
+
 bool allow_goal_modification
+bool allow_while_following