Moved the 'Keep current' option to the top of both date and time format selection lists for improved user experience in the config command.

Pull Request Checklist

• I have read and followed the contribution guidelines.
• My pull request targets the main branch of tmpo.
• I have tested these changes locally on my machine.

Description

This pull request makes small improvements to the user experience in the configuration command by reordering the options for date and time format selection. The "Keep current" option is now listed first in both selectors, making it more convenient for users who do not wish to change their current settings.

• User experience improvements:
  • Changed the order of dateFormatOptions in cmd/config/config.go so that "Keep current" appears first in the date format selection prompt.
  • Changed the order of timeFormatOptions in cmd/config/config.go so that "Keep current" appears first in the time format selection prompt.