add force flag to smallweb link

cmd/link.go

···
 )
 
 func NewCmdLink() *cobra.Command {
+	var flags struct {
+		force bool
+	}
+
 	cmd := &cobra.Command{
 		Use:     "link <source> <target>",
 		Aliases: []string{"ln"},
···
 			target, err := filepath.Abs(args[1])
 			if err != nil {
 				return fmt.Errorf("failed to get absolute path for target: %w", err)
-			}
-
-			if _, err := os.Stat(target); err == nil {
-				return fmt.Errorf("target already exists")
 			}
 
 			// if target is inside the smallweb directory, create a relative symlink
···
 					return fmt.Errorf("failed to get relative path: %w", err)
 				}
 
+				if flags.force {
+					if err := os.Remove(target); err != nil && !os.IsNotExist(err) {
+						return fmt.Errorf("failed to remove existing target: %w", err)
+					}
+				}
+
 				if err := os.Symlink(relative, target); err != nil {
 					return fmt.Errorf("failed to create symbolic link: %w", err)
 				}
···
 			return nil
 		},
 	}
+
+	cmd.Flags().BoolVarP(&flags.force, "force", "f", false, "Force overwrite existing symlinks")
 
 	return cmd
 }