feat(prebuilt): Adds stateModifier param to createReactAgent #1946

Job	Run time
Build	1m 53s
check-readmes-synced	3s
Check formatting	1m 20s
Check linting	1m 47s
Unit Tests (ubuntu-latest, 18.x)	1m 39s
Validate Deno and Node dependencies in sync	6s
Unit Tests (ubuntu-latest, 20.x)	1m 24s
validate-new-notebooks	1m 58s
Unit Tests (ubuntu-latest, 22.4.1)	2m 6s
Unit Tests (windows-latest, 22.4.1)	4m 27s
Unit Tests (macos-latest, 22.4.1)	1m 33s
	18m 16s

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