Add Extend Flatbuffers

Signed-off-by: Mirabel Wang <mirabel.17.wang@gmail.com>
Signed-off-by: Filip Kujawa <filip.j.kujawa@gmail.com>
Change-Id: I71c60a7d3e0018c6669f46d1d14e401e569dc61c
diff --git a/y2024/control_loops/superstructure/superstructure_position.fbs b/y2024/control_loops/superstructure/superstructure_position.fbs
index 8d2b7ca..7ab49a3 100644
--- a/y2024/control_loops/superstructure/superstructure_position.fbs
+++ b/y2024/control_loops/superstructure/superstructure_position.fbs
@@ -25,6 +25,13 @@
 
     // True if there is a game piece in the catapult
     catapult_beam_break:bool (id: 6);
+
+    // Values of the encoder and potentiometer at the extend motor
+    // Zero is fully retracted, positive is extended outward.
+    extend:frc971.PotAndAbsolutePosition (id: 7);
+
+    // True means there is a game piece in the extend.
+    extend_beambreak:bool (id: 8);
 }
 
 root_type Position;