Improve some jogging docstrings

src/openflexure_microscope_server/things/stage/__init__.py

@@ -33,7 +33,11 @@ class RedefinedBaseMovementError(RuntimeError):
 
 
 class JogCommand:
-    """A base class for jog operations."""
+    """A base class for jog operations.
+
+    This class handles threading events used to interrupt previous jog commands. There
+    are two subclasses that are used by jogging `JogMoveCommand` and `JogStopCommand`.
+    """
 
     def __init__(self) -> None:
         """Initialise a JogCommand."""

src/openflexure_microscope_server/things/stage/dummy.py

@@ -72,6 +72,16 @@ class DummyStage(BaseStage):
         }
 
     def _apply_move(self, displacement: Sequence[int]) -> None:
+        """Make a move, this function is designed to be run in a thread by jogging.
+
+        This can't be used for normal movements as the delays setting up the extra
+        threads causes autofucs to fail. As such `_hardware_move_relative` is similarly
+        structured.
+
+        Interrupt this function with the ``self._abort_move`` event.
+
+        :param displacement: The (x, y, z) position.
+        """
         try:
             fraction_complete = 0.0
             dt = self.step_time