Add Vulkan Support

[Kylogias]

Vulkan support for Windows and X11. Adding support for other platforms shouldn't be too difficult (assuming the platforms support the features used in the batched renderer). The compiled SPIR-V shaders are in the tree (and have a separate clean target) so contributers don't need the glslangValidator program if they want to regenerate rawdraw_sf.h

Requirements for the batched renderer:
Vulkan 1.3 with Dynamic Rendering and Synchronization2
VK_KHR_surface
VK_KHR_swapchain
VK_KHR_debug_utils (if using validation layers)

[cnlohr]

Please explain what is going on here.

[Kylogias]

The glslangValidator program has an option to output the compiled SPIR-V as a variable in a C header file, using the --vn parameter (with the name of the variable specified right after), in the following format

    // version
    #pragma once
const uint32_t VariableName[] = {
    insert SPIRV here
};

However, I didn't like how the variable wasn't declared static or how the file contained the #pragma. After looking through the program's command line options, I found the -x option, which was basically the same as --vn but without the pragma or the variable declaration, and that option is what I chose for outputting the generated SPIR-V

[cnlohr]

You definitely need to have a very clear comment explaining how to regenerate those tables / what the files are for!

[cnlohr]

Please also explain what is going on here.

[Kylogias]

Ditto to the comment under vk/cnfgbatch.h

[cnlohr]

You can reference the other file, by name, I would probably err on the side of putting them in the same file.

[Kylogias]

The 3 files have been replaced with a singular file including all 3 shaders and some comments explaining the file

[cnlohr]

This all looks good, merging now.