settings: Add option to dump ExeFS of games upon launch

When enabled, all exefs(es) will be copied to yuzu/dump/<title_id>/exefs.

src/core/file_sys/patch_manager.cpp

@@ -57,6 +57,15 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
     if (exefs == nullptr)
         return exefs;
 
+    if (Settings::values.dump_exefs) {
+        LOG_INFO(Loader, "Dumping ExeFS for title_id={:016X}", title_id);
+        const auto dump_dir = Service::FileSystem::GetModificationDumpRoot(title_id);
+        if (dump_dir != nullptr) {
+            const auto exefs_dir = GetOrCreateDirectoryRelative(dump_dir, "/exefs");
+            VfsRawCopyD(exefs, exefs_dir);
+        }
+    }
+
     const auto installed = Service::FileSystem::GetUnionContents();
 
     // Game Updates

src/core/settings.h

@@ -159,6 +159,7 @@ struct Values {
     bool use_gdbstub;
     u16 gdbstub_port;
     std::string program_args;
+    bool dump_exefs;
     bool dump_nso;
 
     // WebService