Platform.h: Reject big-endian systems (#23684)

Several tests fail on big-endian, indicating that the code isn't prepared
for such systems, but it wouldn't be obvious from just compiling OpenRCT2.
Make it obvious by checking it on Platform.h. Example output:

/home/user/src/OpenRCT2/src/openrct2-ui/../openrct2/platform/Platform.h:34:35: error: static assertion failed: OpenRCT2 is known to be broken on big endian. Proceed with caution!
   34 | static_assert(std::endian::native == std::endian::little,
      |               ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
ninja: job failed

src/openrct2/platform/Platform.h

@@ -13,6 +13,7 @@
 #include "../core/DateTime.h"
 #include "../core/StringTypes.h"
 
+#include <bit>
 #include <ctime>
 #include <vector>
 
@@ -31,6 +32,9 @@
     #define MAX_PATH 260
 #endif
 
+static_assert(
+    std::endian::native == std::endian::little, "OpenRCT2 is known to be broken on big endian. Proceed with caution!");
+
 enum class SPECIAL_FOLDER
 {
     USER_CACHE,