Enhance __repr__ and _repr_html_ with a note for additional rows

[konjac]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
Nowadays, __repr__ and _repr_html_ only shows 10 rows. If the DataFrame contains more than 10 rows, we can show message to indicate there are truncated rows.

Describe the solution you'd like
@timsaucer shared a thought in #discussion_r1957173896. Just take 11 rows internally. If 11 rows are returned, display message for additional rows.

Describe alternatives you've considered
n/a

Additional context
n/a

[kylebarron]

You could also implement a "config" system like pandas uses, so the user can opt-in to displaying more columns or rows https://pandas.pydata.org/docs/user_guide/options.html#overview