Fix up structure and README

examples/4_camera_sanity_check.py

@@ -0,0 +1,32 @@
+from tello_sim.tello_sim_client import TelloSimClient
+import cv2
+
+# Create a Tello instance
+tello = TelloSimClient()
+# Desired window size
+WINDOW_WIDTH = 640
+WINDOW_HEIGHT = 360
+# Connect to Tello
+tello.connect()
+
+tello.streamon()
+
+# Create a normal, resizable window
+cv2.namedWindow("frame", cv2.WINDOW_NORMAL)
+cv2.resizeWindow("frame", WINDOW_WIDTH, WINDOW_HEIGHT)
+
+try:
+    while True:
+        img = tello.get_frame_read().frame
+        if img is not None:
+            img_bgr = cv2.cvtColor(img, cv2.COLOR_RGB2BGR)
+            # Resize the image to fit the window size
+            img_resized = cv2.resize(img_bgr, (WINDOW_WIDTH, WINDOW_HEIGHT), interpolation=cv2.INTER_AREA)
+            cv2.imshow("frame", img_resized)
+        if cv2.waitKey(1) == ord('q'):
+            break
+except KeyboardInterrupt:
+    pass
+finally:
+    print("fin")
+    cv2.destroyAllWindows()