g3d: Implement ResMaterial and ResShaderParam

[arayaphong]

Implements nn::g3d::ResMaterial and nn::g3d::ResShaderParam (lib/g3d/src/g3d/g3d_ResMaterial.cpp), ported from the closed open-ead/nnheaders#88 as requested.

• 23 of the 24 functions in ResMaterial.o match.
• ResShaderParam::ConvertSrt3dCallback is non-matching (SIMD scheduling and register allocation), marked NON_MATCHING with a decomp.me link: https://decomp.me/scratch/lkHXp
• Adds lib/g3d/include/nn/g3d/g3d_ResMaterial.h, adds the source to lib/g3d/CMakeLists.txt, and forward-declares struct TextureRef in g3d_ResFile.h, g3d_ResModel.h and g3d_ResMaterialAnim.h (they previously had typedef void* TextureRef, which conflicts with the real struct definition).
• No changes needed in nnsdk: nn/util/util_Arithmetic.h and nn/gfx/gfx_Sampler.h already provide everything used here.

One thing to decide: ConvertSrt3dCallback uses NEON intrinsics (<arm_neon.h>), which only compile for ARM targets. The PR workflow builds for the x86_64 host, so this file does not compile there. I verified the port itself is correct by compiling it for an aarch64 target, and clang-format/clang-tidy are clean. How would you like architecture-specific code handled here - an aarch64 build path, a guard, or something else?

Formatted with this repo clang-format config; clang-tidy is clean.

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This change is 

[Pistonight]

That is unfortunate and I think we might have to change the setup to cross build for arm64

[arayaphong]

I found SIMDe (https://github.com/simd-everywhere/simde), which could let the NEON intrinsics compile on x86_64. I haven't tried it yet, so I'm not sure how stable it is.

[Pistonight]

I don't think it's worth to add more hacks on top of -D__aarch64__. I got cross build working with the container image and I think the easiest way to go from here is to make a wrapper script that execute commands in the container

[Pistonight]

Hi there! The aarch64 toolchain is set up. If you rebase and revert the CMakeLists.txt changes (it's automatically globbed now), it should build (hopefully)

[Pistonight]

Investigating the arm_neon failure..

[Pistonight]

I didn't include lib/clang headers, will fix that

[Pistonight]

it should be fixed now. Also there are some clang warnings, please consider addressing those since we might turn on -Werror for checks in this repo in the future :)

[arayaphong]

Fixed in 13116f7: removed unused-parameter warnings and replaced the incompatible callback casts.