settings: Move some simple data to BasicSetting

Reduces the need for the compiler to duplicate this code, by about
100KB executable size.

src/common/settings_common.cpp

@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <string>
+#include "common/settings_common.h"
+
+namespace Settings {
+
+BasicSetting::BasicSetting(Linkage& linkage, const std::string& name, enum Category category_,
+                           bool save_, bool runtime_modifiable_)
+    : label{name}, category{category_}, id{linkage.count}, save{save_}, runtime_modifiable{
+                                                                            runtime_modifiable_} {
+    linkage.by_category[category].push_front(this);
+    linkage.count++;
+}
+
+BasicSetting::~BasicSetting() = default;
+
+std::string BasicSetting::ToStringGlobal() const {
+    return this->ToString();
+}
+
+bool BasicSetting::UsingGlobal() const {
+    return true;
+}
+
+void BasicSetting::SetGlobal(bool global) {}
+
+bool BasicSetting::Save() const {
+    return save;
+}
+
+bool BasicSetting::RuntimeModfiable() const {
+    return runtime_modifiable;
+}
+
+Category BasicSetting::Category() const {
+    return category;
+}
+
+const std::string& BasicSetting::GetLabel() const {
+    return label;
+}
+
+} // namespace Settings