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/vision/camera_reader.cc b/y2022/vision/camera_reader.cc
index ba7abaf..012a2db 100644
--- a/y2022/vision/camera_reader.cc
+++ b/y2022/vision/camera_reader.cc
@@ -197,8 +197,8 @@
   }
   // If we are not reading from the disk, we read the live camera stream.
   if (!reader_->ReadLatestImage()) {
-    read_image_timer_->Setup(event_loop_->monotonic_now() +
-                             std::chrono::milliseconds(10));
+    read_image_timer_->Schedule(event_loop_->monotonic_now() +
+                                std::chrono::milliseconds(10));
     return;
   }
 
@@ -212,7 +212,7 @@
   ProcessImage(image_mat, image.monotonic_timestamp_ns());
 
   reader_->SendLatestImage();
-  read_image_timer_->Setup(event_loop_->monotonic_now());
+  read_image_timer_->Schedule(event_loop_->monotonic_now());
 
   // Disable the LEDs based on localizer output
   if (localizer_output_fetcher_.Fetch()) {