Move subsystem simulator to 971

Signed-off-by: Nikita Narang <nikitanarang123@gmail.com>
Change-Id: Ida52062678697ae02cc71d1a9d5870871299751c
diff --git a/frc971/control_loops/BUILD b/frc971/control_loops/BUILD
index 459929b..ee53c4a 100644
--- a/frc971/control_loops/BUILD
+++ b/frc971/control_loops/BUILD
@@ -5,6 +5,21 @@
 package(default_visibility = ["//visibility:public"])
 
 cc_library(
+    name = "subsystem_simulator",
+    testonly = True,
+    hdrs = [
+        "subsystem_simulator.h",
+    ],
+    target_compatible_with = ["@platforms//os:linux"],
+    deps = [
+        "//frc971:constants",
+        "//frc971/control_loops:capped_test_plant",
+        "//frc971/control_loops:control_loop_test",
+        "//frc971/control_loops:position_sensor_sim",
+    ],
+)
+
+cc_library(
     name = "control_loop_test",
     testonly = True,
     srcs = [