Run clang-format on the entire repo

This patch clang-formats the entire repo. Third-party code is
excluded.

I needed to fix up the .clang-format file so that all the header
includes are ordered properly. I could have sworn that it used to work
without the extra modification, but I guess not.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: I64bb9f2c795401393f9dfe2fefc4f04cb36b52f6
diff --git a/frc971/vision/target_mapper.cc b/frc971/vision/target_mapper.cc
index 21bd443..e7a6955 100644
--- a/frc971/vision/target_mapper.cc
+++ b/frc971/vision/target_mapper.cc
@@ -1,6 +1,7 @@
 #include "frc971/vision/target_mapper.h"
 
 #include "absl/strings/str_format.h"
+
 #include "frc971/control_loops/control_loop.h"
 #include "frc971/vision/ceres/pose_graph_3d_error_term.h"
 #include "frc971/vision/geometry.h"