add controller

controller.py

@@ -0,0 +1,17 @@
+import numpy as np
+from PIL import Image
+
+from simulator import EmulatorSimulator
+
+class Controller:
+    def __init__(self, vm_name: str, username: str, password: str, host: str) -> None:
+        self.simulator = EmulatorSimulator(vm_name=vm_name, username=username,
+                                           password=password, host=host)
+    
+    def get_state(self) -> np.ndarray:
+        image_path = self.simulator.get_screenshot()
+        with Image.open(image_path) as img:
+            return np.array(img)
+    
+    def step(self) -> None:
+        self.simulator.keyboard_type("hello word")