cli: add `--tee` and `bar_format={line}`

Hi,

When I use `tqdm` cli version, I found it is pretty hard to print user input so that I can have effects similar to apt progress bar.

Usage:
```bash
echo -e 'A\nB\nC' | tqdm --bar_format="{input}\n{l_bar}{bar}{r_bar}"
```
should show
```
A
B
C
[Progress:  ===========> 100%]
```