feat: multicore pipelining with wave-based parallel execution #211

Job	Run time
build	2m 0s
Build Khronos OpenVX sample	59s
Build rustVX (main)	1m 31s
graph	10s
KHR extension: user-data-object	11s
data-objects	13s
baseline	9s
KHR extension: pipelining fast	11s
KHR extension: pipelining stress	39s
Enhanced-Vision: Tensor Arithmetic	9s
vision-features	17s
vision-color	12s
vision-pyramid	14s
vision-filters	47s
vision-statistics	13s
Enhanced-Vision: Tensor Transforms	11s
image-ops	8s
Enhanced-Vision: Post-Processing	14s
Enhanced-Vision: Feature Extraction	12s
Enhanced-Vision: Control Flow	11s
vision-arithmetic	26s
Enhanced-Vision: Advanced Filtering	55s
vision-geometric	34s
Perf gate (PR vs main)	5m 53s
Benchmark & compare (rustVX vs Khronos sample)	5m 57s
	22m 36s

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