Fix Liveview overflow

[didil]

Fixes #60 improves output trimming for liveview by handling tabs / unicode chars

[jimaek]

Can you please clarify if this fixes the full issue or not? Because the comment by the library maintainer mentioned that there is nothing we can do if the output is larger than the terminal?

[didil]

@jimaek this PR does not modify the logic that we have been using until now to display the content for the liveview:

• lines that are longer than the terminal width are truncated
• if the total number of lines is longer than the terminal height, only the end of the output is displayed

What has been causing the issue we've been having with http https://www.jsdelivr.com --method GET is that the output contains "tab" characters that were not accounted for properly when truncating the output. This PR mostly fixes the handling of "tab" characters.