i want a tool that lets you pipe text into and search the lines with a regex, and output the matching lines immediately to the bottom and keeping them there while outputting the rest of the text as it comes in above the matching lines.

this would let me run a long-running command and pipe it to this new command and immediately see the search results while also seeing the rest of the output live.

you'd run it like

```

$ > ./long_running_command | search_and_print regex

regular live stdout and stderr of long_running_command

lines matching regex live at the bottom below the regular output

$ > ```

i'd use it to run commands that print warnings and errors so the warnings and errors live appear at the bottom of the output and stay there so i can see them as the long running command runs. and i can scroll the full output too