Split D3D12MA support into ComputeSharp.D3D12MemoryAllocator

[Sergio0694]

Description

This PR splits off the D3D12MA support in ComputeSharp (which uses TerraFX.Interop.D3D12MemoryAllocator), into a new ComputeSharp.D3D12MemoryAllocator package. It also adds a new API to allow plugging in the new allocator into ComputeSharp. At the same time, it also adds the ability for developers to implement their own custom allocators.

API breakdown

ComputeSharp:

namespace ComputeSharp.Interop;

public static class AllocationServices
{
    public static void ConfigureAllocatorFactory(ICustomQueryInterface allocatorFactory);
}

ComputeSharp.D3D12MemoryAllocator:

namespace ComputeSharp.D3D12MemoryAllocator;

public sealed class D3D12MemoryAllocatorFactory : ICustomQueryInterface
{
    public D3D12MemoryAllocatorFactory();

    ~D3D12MemoryAllocatorFactory();

    CustomQueryInterfaceResult ICustomQueryInterface.GetInterface(ref Guid iid, out IntPtr ppv);
}

COM API breakdown

This refactoring introduces the following COM interfaces, which developers can also implement manually:

[uuid(CC1E74A7-786D-40F4-8AE2-F8B7A255587E)]
interface ID3D12MemoryAllocatorFactory : IUnknown
{
    HRESULT CreateAllocator(
        [in] const ID3D12Device* device,
        [in] const IDXGIAdapter* adapter,
        [out] ID3D12MemoryAllocator allocator);
};

[uuid(2D5E55D2-9244-431F-868E-0D90AAB6E575)]
interface ID3D12MemoryAllocator : IUnknown
{
    HRESULT AllocateResource(
        [in] const D3D12_RESOURCE_DESC* resourceDescription,
        const D3D12_HEAP_TYPE heapType,
        const D3D12_RESOURCE_STATES resourceState,
        const BOOL clearAllocation,
        [out] ID3D12Allocation** allocation);
};

[uuid(D42D5782-2DE7-4539-A817-482E3AA01E2E)]
interface ID3D12Allocation : IUnknown
{
    HRESULT GetD3D12Resource([out] ID3D12Resource** resource);
};