Modify and restore NVIDIA control panel settings

Namely:
- Power profile for sunshine.exe
- Global OpenGL/Vulkan DXGI swapchain

src/platform/windows/nvprefs/nvprefs_interface.h

@@ -0,0 +1,36 @@
+#pragma once
+
+namespace nvprefs {
+
+  class nvprefs_interface {
+  public:
+    nvprefs_interface();
+    ~nvprefs_interface();
+
+    bool
+    load();
+
+    void
+    unload();
+
+    bool
+    restore_from_and_delete_undo_file_if_exists();
+
+    bool
+    modify_application_profile();
+
+    bool
+    modify_global_profile();
+
+    bool
+    owning_undo_file();
+
+    bool
+    restore_global_profile();
+
+  private:
+    struct impl;
+    std::unique_ptr<impl> pimpl;
+  };
+
+}  // namespace nvprefs