func Basename(filePath string) string {
	return filepath.Base(filePath)
}
Basename returns the last element of path
package filesystem
import (
	"path/filepath"
	"strings"
)
func Directory(filePath string) string {
	if filepath.Ext(filePath) == "" {  
		return filePath
	}
	return filepath.Dir(filePath)
}
func Clean(filePath string) string {
	return filepath.Clean(filePath)
}
func Extension(filePath string) string {
	return filepath.Ext(filePath)
}