feat: OpenVX Pipelining, Streaming & Batch Processing KHR extension #197

Job	Run time
Build Khronos OpenVX sample	41s
Build rustVX (main)	1m 31s
build	1m 49s
KHR extension: pipelining fast	12s
data-objects	11s
graph	10s
baseline	10s
KHR extension: user-data-object	9s
KHR extension: pipelining stress	44s
vision-statistics	10s
vision-color	14s
vision-pyramid	9s
Enhanced-Vision: Tensor Arithmetic	13s
Enhanced-Vision: Control Flow	9s
Enhanced-Vision: Post-Processing	11s
Enhanced-Vision: Advanced Filtering	1m 3s
image-ops	10s
Enhanced-Vision: Feature Extraction	13s
Enhanced-Vision: Tensor Transforms	12s
vision-geometric	36s
Perf gate (PR vs main)	3m 5s
vision-arithmetic	29s
vision-features	21s
vision-filters	55s
Benchmark & compare (rustVX vs Khronos sample)	4m 36s
	18m 23s

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