Add optional `header` field to ask_user across all SDKs #256

Job	Run time
Detect changed paths	6s
Skip (actions)	47s
Analyze (javascript-typescript)	2m 3s
Analyze (go)	2m 7s
Analyze (python)	3m 12s
Analyze (rust)	2m 24s
Analyze (csharp)	24m 41s
Analyze (java-kotlin)	3m 23s
	38m 43s

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