NAME
strwidth() - returns the display width of a string
SYNOPSIS
int strwidth( string str );
DESCRIPTION
strwidth() returns the number of columns to display string 'str'.
The driver uses rules defined in https://www.unicode.org/reports/tr11/tr11-36.html to calcuate character width.
Control characters has no width, Wide characters, including emojis are two column wide. This rule is also used by
sprintf() to layout strings.
SEE ALSO
strlen()