feat: multicore pipelining with wave-based parallel execution #207

Job	Run time
Build Khronos OpenVX sample	1m 2s
Build rustVX (main)	1m 29s
build	1m 46s
image-ops	13s
vision-geometric	38s
KHR extension: pipelining fast	13s
baseline	9s
data-objects	10s
KHR extension: pipelining stress	38s
graph	9s
KHR extension: user-data-object	8s
vision-color	11s
vision-features	17s
vision-filters	59s
Enhanced-Vision: Tensor Arithmetic	13s
Enhanced-Vision: Feature Extraction	8s
vision-statistics	14s
Enhanced-Vision: Control Flow	45s
vision-arithmetic	24s
vision-pyramid	10s
Enhanced-Vision: Tensor Transforms	8s
Enhanced-Vision: Advanced Filtering	59s
Perf gate (PR vs main)	2m 59s
Enhanced-Vision: Post-Processing	10s
Benchmark & compare (rustVX vs Khronos sample)	4m 33s
	18m 45s

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