docs: Add OpenAI API compatibility page (#2316) #2374

Job	Run time
test-matrix (agents, library)	4m 36s
test-matrix (inference, library)	5m 37s
test-matrix (agents, http)	7m 13s
test-matrix (inspect, library)	2m 9s
test-matrix (datasets, http)	2m 15s
test-matrix (inference, http)	7m 57s
test-matrix (inspect, http)	2m 5s
test-matrix (datasets, library)	1m 49s
test-matrix (scoring, library)	1m 50s
test-matrix (scoring, http)	2m 3s
test-matrix (providers, http)	1m 56s
test-matrix (tool_runtime, http)	2m 11s
test-matrix (post_training, http)	3m 15s
test-matrix (tool_runtime, library)	3m 20s
test-matrix (post_training, library)	5m 19s
test-matrix (providers, library)	2m 10s
	55m 45s

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