tools: add byd_can_dump.py — per-bus CAN address/rate dump for BYD bring-up

BYD Seal reports steering torque on 508 STEERING_TORQUE_ANGLE while the
Han uses 792 STEERING_TORQUE, and PCM_BUTTONS bus assignment is harness
dependent. This tool prints bus/addr/len/rate tables (with key BYD
addresses flagged) from either the latest recorded route (safe, no
hardware) or a live panda sniff (manager stopped).

opendbc_repo/opendbc/car/tests/routes.py

@@ -1,5 +1,6 @@
 from typing import NamedTuple
 
+from opendbc.car.byd.values import CAR as BYD
 from opendbc.car.chrysler.values import CAR as CHRYSLER
 from opendbc.car.gm.values import CAR as GM
 from opendbc.car.ford.values import CAR as FORD
@@ -20,6 +21,8 @@ from opendbc.car.psa.values import CAR as PSA
 # FIXME: add routes for these cars
 non_tested_cars = [
   MOCK.MOCK,
+  BYD.BYD_HAN_EV_23,
+  BYD.BYD_SEAL_PERFORMANCE_25,
   GM.CADILLAC_ATS,
   GM.HOLDEN_ASTRA,
   GM.CHEVROLET_MALIBU,