Check presentation support in isDeviceSuitable - #474
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isDeviceSuitable() only checked for a graphics-capable queue family, but createLogicalDevice() later requires one that supports both graphics and presentation. A device could pass suitability and then throw in createLogicalDevice(). Extends the existing search to also require getSurfaceSupportKHR(qfpIndex, *surface), applied consistently across every chapter from window-surface creation onward.
Fixes #457.