Delete all Login Items before running mli load

[5ouma]

✏️ Describe the feature

Now Add() only adds Login Items from login_items.json as its name implies.
However, mli is usually used to set all Login Items, and system Login Items should respect them in the file.
System Login Items can be deleted by osascript -e 'tell app "System Events" to delete login items'.

mli/lib/oascript.go

Lines 46 to 59 in fd914ba

	func (loginItems *LoginItems) Add() error {
	for _, loginItem := range *loginItems {
	if isExist, err := isExist(loginItem.Path); !isExist && err == nil {
	fmt.Printf("⚠️ not found: \"%s\"\n", loginItem.Path)
	continue
	}
	if _, err := mack.Tell("System Events", fmt.Sprintf(`make login item at end with properties { name: "%s", path: "%s", hidden: %v }`, loginItem.Name, loginItem.Path, loginItem.Hidden)); err != nil {
	return err
	}
	fmt.Printf("🔍 %s\n", loginItem.Name)
	}
	return nil
	}

✔︎ Confirm these checks

• I searched the GitHub Issues or Discussions.
• I tried with the latest version.
• I agree to follow the Code of Conduct.

🗒️ Additional Information

No response