Run clang-format on all files

The main change here is to reorder headers.

src/fish.cpp

@@ -30,9 +30,9 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 #include <sys/resource.h>
 #include <sys/stat.h>
 #include <unistd.h>
+
 #include <cstring>
 #include <cwchar>
-
 #include <memory>
 #include <string>
 #include <vector>