graphics: option to change monitor resolution (#689)

## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change
Add a new option under `Monitor` group to change the monitor resolution
before booting the game, very similar to how orientation / refresh rate
options work.

This would be useful for games like Polaris Chord that boots at current
resolution but manages to have graphical issues when not in 1080p.

## Testing

src/spice2x/hooks/graphics/graphics.h

@@ -117,6 +117,10 @@ void graphics_load_windowed_subscreen_parameters();
 void graphics_window_check_bounds_before_creation(int &x, int &y, const int width, const int height);
 
 void change_primary_monitor(const std::string &monitor_name);
-void update_monitor_on_boot(std::optional<graphics_orientation> target_orientation, UINT target_refresh_rate);
+void update_monitor_on_boot(
+    std::optional<graphics_orientation> target_orientation,
+    UINT target_refresh_rate,
+    std::optional<std::pair<uint32_t, uint32_t>> target_resolution);
+
 void update_monitor_at_runtime();
 void reset_monitor_on_exit();