Add OpenVINO NPU INT4 model (mobius + K-Quant) for google/gemma-4-E2B-it

Add f16 webgpu build (gemma-4-E2B-it)

Add NF4/cuda CUDA EP quantized variant

Add Q4_K_M/cuda CUDA EP quantized variant

Re-export bf16/onnx-standard with onnx external data format

Re-export bf16/cuda with onnx external data format

Re-export bf16/default with onnx external data format

Re-export f16/onnx-standard with onnx external data format

Re-export f16/cuda with onnx external data format

Re-export f16/default with onnx external data format

Add Q4_K_M quantized variant

Add NF4 quantized variant

Add int4-kquant quantized variant

Add int4-nf4 quantized variant

Add Gemma4-e2b-it ONNX model (bf16) built with mobius

initial commit