mfc: detect 2025 version (#416)

## Link to GitHub Issue, if one exists
n/a

## Description of change
They moved some DLLs around so MFC wasn't being auto-detected, and I/O
hooks were not being performed. Fix that.

## Testing
The game boots into test menu, some i/o works, touch doesn't, not
playable yet.

src/spice2x/games/mfc/mfc.cpp

@@ -308,6 +308,13 @@ namespace games::mfc {
         auto allinone_module = libutils::try_module("allinone.dll");
         auto system_module = libutils::try_module("system.dll");
 
+        // Mahjong Fight Club - 2025?
+        // they removed allinone.dll and moved i/o into system.dll
+        if (allinone_module == nullptr) {
+            log_misc("mfc", "using system.dll instead of allinone.dll for i/o hooks");
+            allinone_module = system_module;
+        }
+
         // network fix
         detour::iat_try("?nic_dhcp_maybe_exist@@YAEXZ", nic_dhcp_maybe_exist, system_module);