Rename timer `Setup` function to `Schedule`

This patch was motivated by my desire to fix a typo in the function
name. The noun "setup" is 1 word. The verb "set up" is 2 words. All
other member functions are verbs, so this one should be a verb too.
That means that the function should be called `SetUp`. During the
discussion that resulted from the rename, James Kuszmaul pointed out
that "setting up" a timer can be confusing. It implies that you can
only "set up" a timer once. But the intent is to let users set up
timers as many times as they like. So we decided on renaming the
function to `Schedule`. That conveys the purpose and intent better.

I took this opportunity to fix some other typos involving the verb
"set up".

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: I2f557d1f946960af82711f248820d5e2d385a5d3
diff --git a/y2022/localizer/localizer_test.cc b/y2022/localizer/localizer_test.cc
index 6083143..0db26b6 100644
--- a/y2022/localizer/localizer_test.cc
+++ b/y2022/localizer/localizer_test.cc
@@ -420,8 +420,8 @@
         }
       });
       roborio_test_event_loop_->OnRun([timer, this]() {
-        timer->Setup(roborio_test_event_loop_->monotonic_now(),
-                     std::chrono::milliseconds(5));
+        timer->Schedule(roborio_test_event_loop_->monotonic_now(),
+                        std::chrono::milliseconds(5));
       });
     }
     {
@@ -474,8 +474,8 @@
             builder.Send(TargetEstimate::Pack(*builder.fbb(), estimate.get())));
       });
       camera_test_event_loop_->OnRun([timer, this]() {
-        timer->Setup(camera_test_event_loop_->monotonic_now(),
-                     std::chrono::milliseconds(50));
+        timer->Schedule(camera_test_event_loop_->monotonic_now(),
+                        std::chrono::milliseconds(50));
       });
     }
 
@@ -508,7 +508,7 @@
     localizer_control_x_ = x;
     localizer_control_y_ = y;
     localizer_control_theta_ = theta;
-    localizer_control_send_timer_->Setup(
+    localizer_control_send_timer_->Schedule(
         roborio_test_event_loop_->monotonic_now());
   }
   ::testing::AssertionResult IsNear(double expected, double actual,