Improves parking state detection and logging

Enhances parking state logic by setting the initial gear to "P" and adding more detailed logging for state changes and parking events.

This provides better insight into vehicle states and parking behaviors.

Source/ProofOfConcept/Models/TeslaState.cs

@@ -2,7 +2,7 @@ namespace ProofOfConcept.Models;
 
 public class TeslaState
 {
-    private string gear = "";
+    private string gear = "P";
     private bool locked;
     private bool driverSeatOccupied;
     private bool gpsState;