Support selecting drivetrain side in TargetSelector

In doing this, I am thinking that we'll probably want to make the
hysteresis in the target selector *much* less aggressive so that we can
allow the manipulator to make mistakes.

Change-Id: I7c5047f75e7e0fd4eae168e1a40ffbb71c093f87
Signed-off-by: James Kuszmaul <jabukuszmaul@gmail.com>
diff --git a/y2023/control_loops/drivetrain/BUILD b/y2023/control_loops/drivetrain/BUILD
index 32b8c15..a12326c 100644
--- a/y2023/control_loops/drivetrain/BUILD
+++ b/y2023/control_loops/drivetrain/BUILD
@@ -131,6 +131,9 @@
     ],
     gen_reflections = 1,
     visibility = ["//visibility:public"],
+    deps = [
+        "//frc971/control_loops/drivetrain:drivetrain_status_fbs",
+    ],
 )
 
 cc_library(