Add basic surface handling to RenderDriver and WindowDriver

This will likely require significant rework but it will do for now. A
considerations worth thinking about:

- What happends when the WindowDriver destroys a window, what happens to
  the corresponding surface?

engine/include/nova/render/render_driver.h

@@ -7,7 +7,6 @@
 #pragma once
 
 #include <nova/api.h>
-#include <nova/platform/window_driver.h>
 #include <nova/render/render_api.h>
 #include <nova/render/render_device.h>
 #include <nova/types.h>
@@ -15,6 +14,11 @@
 #include <string>
 
 namespace Nova {
+	using WindowID = uptr;
+	using SurfaceID = uptr;
+
+	class WindowDriver;
+
 	class NOVA_API RenderDriver {
 	  public:
 		static RenderDriver* create(RenderAPI api, WindowDriver* window_driver = nullptr);
@@ -28,5 +32,14 @@ namespace Nova {
 		[[nodiscard]] virtual u32 get_device_count() const = 0;
 		[[nodiscard]] virtual const RenderDevice& get_device(u32 index) const = 0;
 		virtual void select_device(u32 index) = 0;
+
+		[[nodiscard]] virtual SurfaceID create_surface(WindowID window) = 0;
+		virtual void destroy_surface(SurfaceID surface) = 0;
+		// TODO: get_surface_size
+		// TODO: get_surface_mode
+		// TODO: get_surface_state
+		// TODO: set_surface_size
+		// TODO: set_surface_mode
+		// TODO: set_surface_state
 	};
 } // namespace Nova