Add Pico touch routing abstraction

pico-dashboard/hardware/touch.py

@@ -0,0 +1,21 @@
+class TouchEvent:
+    def __init__(self, x, y, pressed=True):
+        self.x = x
+        self.y = y
+        self.pressed = pressed
+
+
+class TouchController:
+    def __init__(self, touch_device=None):
+        self.touch_device = touch_device
+
+    def read_event(self):
+        if not self.touch_device:
+            return None
+
+        point = self.touch_device.read()
+
+        if not point:
+            return None
+
+        return TouchEvent(point["x"], point["y"], point.get("pressed", True))