AK: Use process name on Windows for dbgln()

Author: https://github.com/pheonixfirewingz
Commit: https://github.com/LadybirdBrowser/ladybird/commit/90bb8ed33e3
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1695
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/nico
Reviewed-by: https://github.com/vitalyster

AK/Format.cpp

@@ -1204,6 +1204,11 @@ void vdbg(StringView fmtstr, TypeErasedFormatParams& params, bool newline)
             }
 #    endif
         }
+#else
+        auto process_name = process_name_for_logging();
+        if (!process_name.is_empty()) {
+            builder.appendff("{}: ", process_name);
+        }
 #endif
     }