Definitions, solutions, and evaluation trace updates for ncnn kernels

add baseline solution source at all neural network kernel definitions

Update definition and workload for CV model kernels:

Resolve conflict and recover nn kernel traces

local snapshot before syncing with HF

Replace pre-PR#15 conv2d-only trace with current simd-loop set (definitions + workloads + reference/autovec solutions)

reset convolution kernel definition, workload, and solution; cin now is an axe of input shape

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Add simd-loop definitions (23 loops: scalar-output, array-output, inplace-sort)

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