Introduce ZoneWindowDrawing files and move stuff to better place (#6142)

src/modules/fancyzones/lib/ZoneWindowDrawing.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <vector>
+#include <wil\resource.h>
+#include <winrt/base.h>
+
+#include "util.h"
+#include "Zone.h"
+
+namespace ZoneWindowDrawing
+{
+    struct ColorSetting
+    {
+        BYTE fillAlpha{};
+        COLORREF fill{};
+        BYTE borderAlpha{};
+        COLORREF border{};
+        int thickness{};
+    };
+
+    void DrawBackdrop(wil::unique_hdc& hdc, RECT const& clientRect) noexcept;
+    void DrawActiveZoneSet(wil::unique_hdc& hdc,
+                           COLORREF zoneColor,
+                           COLORREF zoneBorderColor,
+                           COLORREF highlightColor,
+                           int zoneOpacity,
+                           const std::vector<winrt::com_ptr<IZone>>& zones,
+                           const std::vector<size_t>& highlightZones,
+                           bool flashMode,
+                           bool drawHints) noexcept;
+}