Add Esp32 (serial) vehicle to pycar

pycar/src/car/control/gpio/abstract_vehicle.py

@@ -0,0 +1,26 @@
+from abc import ABC, abstractmethod, abstractproperty
+
+class AbstractVehicle(ABC):
+    
+    @abstractmethod
+    @property
+    def throttle(self):
+        pass
+
+    @abstractmethod
+    @throttle.setter
+    def throttle(self):
+        pass
+
+    @abstractmethod
+    @property
+    def steering(self):
+        pass
+
+    @abstractmethod
+    @steering.setter
+    def throttle(self):
+        pass
+
+    def stop(self):
+        pass