feat(openai-agents): add @temporalio/openai-agents package #6003

Job	Run time
Compile Native Binaries (linux-x64)	1m 31s
Compile Native Binaries (linux-arm)	2m 21s
Compile Native Binaries (windows-x64)	3m 11s
Stress Tests (No Reuse V8 Context) / stress-test	27s
Features Tests / test	41s
Compile Native Binaries (macos-x64)	2m 28s
Compile Native Binaries (macos-arm)	1m 44s
Lint and Prune / Lint and Prune	13s
Build Docs / Build Docs	18s
Stress Tests (Reuse V8 Context) / stress-test	20s
Run Integration Tests (linux-x64, Node 20, Reuse V8 Context false)	24s
Run Integration Tests (windows-x64, Bun, Reuse V8 Context true)	44s
Run Integration Tests (windows-x64, Node 20, Reuse V8 Context true)	1m 34s
Run Integration Tests (windows-x64, Node 24, Reuse V8 Context true)	39s
Run Integration Tests (macos-x64, Bun, Reuse V8 Context true)	30s
Run Integration Tests (linux-x64, Bun, Reuse V8 Context false)	19s
Run Integration Tests (macos-x64, Node 20, Reuse V8 Context true)	46s
Run Integration Tests (linux-x64, Node 24, Reuse V8 Context false)	21s
Run Integration Tests (linux-arm, Node 20, Reuse V8 Context true)	36s
Run Integration Tests (linux-arm, Node 24, Reuse V8 Context true)	29s
Run Integration Tests (macos-arm, Node 20, Reuse V8 Context true)	22s
Run Integration Tests (macos-x64, Node 24, Reuse V8 Context true)	29s
Run Integration Tests (macos-arm, Node 24, Reuse V8 Context true)	23s
Run Integration Tests (macos-arm, Bun, Reuse V8 Context true)	25s
Run Integration Tests (linux-arm, Bun, Reuse V8 Context true)	29s
	21m 44s

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