Switch move buttons to use jog

This implements a nicer version of jogging, with a defined interval of 1/3 second. This can be tuned depending on what we think makes sense.

It might be good to re-use this for handling keypresses.

src/openflexure_microscope_server/things/stage/sangaboard.py

@@ -366,7 +366,9 @@ class SangaboardThing(BaseStage):
         will terminate, and `self._jog_received` will be set again. This means that
         it should be safe to
         """
-        duration = 1  # How long to wait initially. This shouldn't ever need to be long.
+        duration = (
+            1.0  # How long to wait initially. This shouldn't ever need to be long.
+        )
         # On subsequent loop iterations, we'll wait long enough that we expect the last
         # move to have finished.
         previous_command: Optional[JogCommand] = None