Split up zeroing library BUILD rules

There was no good reason for one build rule to have both the interface
and a bunch of implementations; split it up and make the relevant users
depend on the libraries directly.

Change-Id: If6a0aa49dd7ea588b7325604658bc0594db4aac0
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/y2023/control_loops/superstructure/arm/BUILD b/y2023/control_loops/superstructure/arm/BUILD
index a742c50..768a54e 100644
--- a/y2023/control_loops/superstructure/arm/BUILD
+++ b/y2023/control_loops/superstructure/arm/BUILD
@@ -16,6 +16,7 @@
         "//frc971/control_loops/double_jointed_arm:graph",
         "//frc971/control_loops/drivetrain:drivetrain_can_position_fbs",
         "//frc971/zeroing",
+        "//frc971/zeroing:pot_and_absolute_encoder",
         "//y2023:constants",
         "//y2023/control_loops/superstructure:superstructure_position_fbs",
         "//y2023/control_loops/superstructure:superstructure_status_fbs",
diff --git a/y2023/control_loops/superstructure/arm/arm.h b/y2023/control_loops/superstructure/arm/arm.h
index 1f97d80..6153400 100644
--- a/y2023/control_loops/superstructure/arm/arm.h
+++ b/y2023/control_loops/superstructure/arm/arm.h
@@ -5,6 +5,7 @@
 #include "frc971/control_loops/double_jointed_arm/dynamics.h"
 #include "frc971/control_loops/double_jointed_arm/ekf.h"
 #include "frc971/control_loops/double_jointed_arm/graph.h"
+#include "frc971/zeroing/pot_and_absolute_encoder.h"
 #include "frc971/zeroing/zeroing.h"
 #include "y2023/constants.h"
 #include "y2023/control_loops/superstructure/arm/generated_graph.h"