Add new ROUTER_LATE role (#5528)

Will always rebroadcast packets, but will do so after all other modes.
Intended for router nodes that are there to provide additional coverage
in areas not already covered by other routers, or to bridge around
problematic terrain, but should not be given priority over other routers
in order to avoid unnecessaraily consuming hops.

By default, this role will rebroadcast during the normal client window.
However, if another node is overheard rebroadcasting the packet, then it
will be moved to a second window *after* the normal client one, with the
same timing behaviour.

src/mesh/MeshPacketQueue.h

@@ -36,5 +36,5 @@ class MeshPacketQueue
     meshtastic_MeshPacket *getFront();
 
     /** Attempt to find and remove a packet from this queue.  Returns the packet which was removed from the queue */
-    meshtastic_MeshPacket *remove(NodeNum from, PacketId id);
-};
+    meshtastic_MeshPacket *remove(NodeNum from, PacketId id, bool tx_normal = true, bool tx_late = true);
+};