wtswidth v1.2

Changes:

• makes all gc=Cf, GCB=CN codepoints zero-width, but also
  treats them as Extender codepoints
• updates the tables to Unicode 16.0

Related Windows Terminal PR:
microsoft/terminal#18285

wtswidth v1.1

Changes:

• The tool now accepts several string arguments at once.
• (breaking) The string widths are written as list of numbers of character cells. Previously the return code has been used.
  Reasons:
  • not more than one value can be returned at a time
  • the return value on platforms other than Windows might be limited to 0..255, where the original value is narrowed to its 8 low order bits
• Incorporates the fix for spacing marks in Windows Terminal. (see Give spacing marks space)

wtswidth v1.0

These are builds from the initially committed code.
Pass a string to the utility. The return value is the width of the string as number of columns in the Windows Terminal window. Test scripts are included.