add back sleeps. I will do a cleaner version in separate MR

Author: peter

README.md

@@ -120,6 +120,9 @@ with pyspacemouse.open() as device:
 ### Callbacks
 
 ```python
+import pyspacemouse
+import time
+
 # Button callback
 def on_button(state, buttons, pressed):
     print(f"Button {pressed} pressed!")

examples/02_callbacks.py

@@ -49,4 +49,4 @@ def on_any_button(state, buttons):
 
     while True:
         device.read()  # Must call read() to process callbacks
-        time.sleep(0.01)  # NOTE: large sleeps can cause data to buffer
+        time.sleep(0.01)

examples/03_multi_device.py

@@ -4,6 +4,8 @@
 useful for dual-hand control or controlling multiple robots.
 """
 
+import time
+
 import pyspacemouse
 
 
@@ -39,6 +41,8 @@ def main():
                         f"Right: x={right.x:+.2f} y={right.y:+.2f} z={right.z:+.2f}"
                     )
 
+                time.sleep(0.01)
+
 
 if __name__ == "__main__":
     main()