feat: OpenVX Pipelining, Streaming & Batch Processing KHR extension #191

Job	Run time
Build rustVX (main)	1m 30s
Build Khronos OpenVX sample	56s
build	1m 39s
KHR extension: user-data-object	7s
data-objects	12s
vision-color	16s
baseline	11s
KHR extension: pipelining fast	15m 12s
KHR extension: pipelining stress	15m 8s
graph	14s
vision-arithmetic	25s
vision-filters	1m 1s
Enhanced-Vision: Advanced Filtering	58s
vision-statistics	10s
Enhanced-Vision: Feature Extraction	13s
Enhanced-Vision: Tensor Arithmetic	9s
vision-features	22s
Enhanced-Vision: Post-Processing	11s
image-ops	8s
Enhanced-Vision: Tensor Transforms	8s
vision-pyramid	14s
vision-geometric	35s
Perf gate (PR vs main)	2m 53s
Enhanced-Vision: Control Flow	8s
Benchmark & compare (rustVX vs Khronos sample)	5m 40s
	48m 40s

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