Improvement: Add a framework to support various Heartbeat can messages

[jamiejones85]

Most HV components require a heartbeat type message, 0x285 for example with Outlander stuff. The current code setup will duplicate this message if multiple components are used.

E.G. Outlander Charger and Outlander Inverter. Both modules send out 0x285. Ideally the VCU would send this only once to each required can bus at the required intervals.