Manually port d3dx12.h as expansions partials to generated code

[Perksey]

d3dx12.h contains really useful helper APIs for working with Direct3D 12. We should consider porting these to Silk.NET.Direct3D12 to make life easier for our users.

This isn't a hard task, just involves creating additional, manual partials for each struct d3dx12 has helper methods for, or methods in the manual part of the D3D12 class. As such, any help from the community would be appreciated.

[Perksey]

Adding this for this year's Hacktoberfest. This doesn't require much foreknowledge of Silk.NET's internals, and just requires making a few manual partial classes which build on top of the automated ones which make a C# mirror of the API in d3dx12.h (linked above).

This can be done incrementally, so you can make a start on this by porting some of the APIs and leave it off where you feel comfortable - just make sure you tell us here if you make a start on this! 😄

[Aycon3296]

3 years have passed. This is still relevant.

[Perksey]

@Aycon3296 No one said it isn’t. You may notice it’s marked as “good first issue” and “help wanted” - we want help with this and we believe anyone can do it. The team has bigger things to work on that aren’t as accessible to external contributors, and we will work on those tasks instead. Be the change you want to see.