clang-format all files in {Source,test}/

Also includes a few manual tweaks to comments and newlines for better results.

Co-authored-by: Anders Jenbo <anders@jenbo.dk>

Source/encrypt.cpp

@@ -4,9 +4,9 @@
  * Implementation of functions for compression and decompressing MPQ data.
  */
 #include <SDL.h>
+#include <array>
 #include <cctype>
 #include <memory>
-#include <array>
 
 #include "encrypt.h"
 #include "pkware.h"