b7640

ggml webgpu: add CEIL operation support (#18605)

• ggml-webgpu: add CEIL operation support

  Add support for the CEIL unary operation in the WebGPU backend:
  - Add CEIL_FUNC shader template in unary_op.wgsl
  - Add 4 shader variants (f32, f16, inplace versions)
  - Initialize CEIL pipelines in ggml-webgpu.cpp
  - Register CEIL in supports_op function
  

• docs: update WebGPU ops support for CEIL

macOS/iOS:

• macOS Apple Silicon (arm64)
• macOS Intel (x64)
• iOS XCFramework

Linux:

• Ubuntu x64 (CPU)
• Ubuntu x64 (Vulkan)
• Ubuntu s390x (CPU)

Windows:

• Windows x64 (CPU)
• Windows arm64 (CPU)
• Windows x64 (CUDA 12) - CUDA 12.4 DLLs
• Windows x64 (CUDA 13) - CUDA 13.1 DLLs
• Windows x64 (Vulkan)
• Windows x64 (SYCL)
• Windows x64 (HIP)

openEuler:

• openEuler x86 (310p)
• openEuler x86 (910b)
• openEuler aarch64 (310p)
• openEuler aarch64 (910b)