Add Proximity Alert

[Flohhhhh]

Add a function where car can activate lights when someone approaches vehicle.

Need some smart logic and state logic for this.

• only when in park mode for a certain amount of time
• never trigger when any door is open
• never trigger on anyone who previously occupied the vehicle in any seat
• maybe only trigger when approached from side and rear?
• things like this, basically a way to make sure its not constantly firing

Can trigger siren if easy? Not sure if LVC would have to be involved here.

Config setup method undecided.