feat: multicore pipelining with wave-based parallel execution #212

Job	Run time
Build rustVX (main)	1m 31s
build	1m 52s
Build Khronos OpenVX sample	1m 2s
data-objects	9s
KHR extension: pipelining fast	12s
graph	18s
KHR extension: user-data-object	8s
vision-color	12s
baseline	9s
KHR extension: pipelining stress	38s
Enhanced-Vision: Feature Extraction	12s
vision-geometric	38s
Enhanced-Vision: Control Flow	14s
vision-arithmetic	25s
Enhanced-Vision: Post-Processing	11s
image-ops	9s
Enhanced-Vision: Advanced Filtering	1m 2s
vision-filters	55s
Enhanced-Vision: Tensor Arithmetic	9s
vision-statistics	14s
vision-features	17s
vision-pyramid	10s
Enhanced-Vision: Tensor Transforms	9s
Perf gate (PR vs main)	7m 15s
Benchmark & compare (rustVX vs Khronos sample)	5m 33s
	23m 44s

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