Use prompt_llm() for text in add_question() to make an adaptive
question, or for intro to put generated content before a question.
Examples
prompt_llm("Share a short fun fact about {flavor} ice cream.")
#> $prompt
#> [1] "Share a short fun fact about {flavor} ice cream."
#>
#> $format
#> NULL
#>
#> attr(,"class")
#> [1] "surveychat_prompt"
prompt_llm("Share a fun fact about {flavor}.", format = "Oh! {content}")
#> $prompt
#> [1] "Share a fun fact about {flavor}."
#>
#> $format
#> [1] "Oh! {content}"
#>
#> attr(,"class")
#> [1] "surveychat_prompt"
