docs: add MTP speculative decoding benchmark results (M5 Pro 64GB) (#… #352

Job	Run time
build_and_unit_test	13m 58s
ssd-draft-memory-guard	2m 26s
speculative-decoding-eval	9m 52s
speculative-decoding	11m 57s
integration_matrix (omni)	4m 32s
integration_matrix (vision)	1m 29s
integration_matrix (opencode)	4m 57s
dflash-speculative-decoding	14m 41s
integration_matrix (graph)	1m 12s
integration_matrix (audio)	2m 32s
integration_matrix (server)	1m 15s
	1h 8m 51s

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