switch to INI for settings (easier), make settings a singleton thingy, slightly simplify core pause/stop/reset. Drop support for remappable inputs for now

src/backend/Core.cpp

@@ -8,22 +8,22 @@ Core::Core() : cpu(std::make_unique<Interpreter>(parallel)) {}
 void Core::Stop() {
   pause = true;
   romLoaded = false;
+  rom = {};
   cpu->Reset();
 }
 
 bool Core::LoadTAS(const fs::path &path) const { return cpu->GetMem().mmio.si.pif.movie.Load(path); }
 
 void Core::LoadROM(const std::string &rom_) {
-  pause = true;
+  Stop();
   rom = rom_;
   cpu->Reset();
-  romLoaded = true;
-
+  
   std::string archive_types[] = {".zip", ".7z", ".rar", ".tar"};
-
+  
   auto extension = fs::path(rom).extension().string();
   const bool isArchive = std::ranges::any_of(archive_types, [&extension](const auto &e) { return e == extension; });
-
+  
   cpu->GetMem().LoadROM(isArchive, rom);
   GameDB::match(cpu->GetMem());
   if (cpu->GetMem().rom.gameNameDB.empty()) {
@@ -37,6 +37,7 @@ void Core::LoadROM(const std::string &rom_) {
   cpu->GetMem().LoadSRAM(cpu->GetMem().saveType, rom);
   cpu->GetMem().mmio.si.pif.Execute();
   pause = false;
+  romLoaded = true;
 }
 
 void Core::Run(float volumeL, float volumeR) {