gander_peek() returns the ellmer Chat object from the most recent call
to the gander assistant so that you can see what happened under-the-hood.
Note that gander initializes a new chat every time you invoke the addin, so the token count and conversation history only describes the most recent interaction with the package.
Value
The ellmer Chat object from the last assistant interaction,
or NULL if no previous interaction exists.
Examples
if (FALSE) { # \dontrun{
# First, run the addin to generate a response.
gander_addin()
# Then, use this function to examine what happened under-the-hood:
gander_peek()
} # }