Send a system notification.

Displays a native operating system notification with the specified title and message.
Works across Windows, macOS, and Linux platforms.

Args:
    title: The title of the notification (required)
    message: The message body of the notification (required)
    app_name: The name of the application sending the notification (optional)
    timeout: Duration in seconds to display the notification (default: 10)

Returns:
    A success message if the notification was sent successfully, or an error message if it failed.

Examples:
    send_notification("Task Complete", "Your build has finished successfully")
    send_notification("Warning", "Low disk space detected", app_name="System Monitor", timeout=5)

Get comprehensive information about the current date.

Returns:
    DateInfo: A dictionary containing comprehensive date and time information:
        - full_datetime (str): Full date and time in YYYY-MM-DD HH:MM:SS format
        - iso_date (str): ISO 8601 date format (YYYY-MM-DD)
        - iso_datetime (str): ISO 8601 datetime format with timezone
        - timestamp (int): Unix timestamp (seconds since epoch)
        - year (int): Current year (e.g., 2024)
        - month (int): Current month (1-12)
        - day (int): Current day of the month (1-31)
        - day_of_year (int): Day number in the year (1-366)
        - day_of_week_number (int): Day of the week (0=Monday, 6=Sunday)
        - day_name (str): Full name of the day (e.g., "Monday")
        - day_name_short (str): Short name of the day (e.g., "Mon")
        - month_name (str): Full name of the month (e.g., "January")
        - month_name_short (str): Short name of the month (e.g., "Jan")
        - is_leap_year (bool): True if current year is a leap year
        - week_number (int): ISO 8601 week number (1-53)
        - iso_year (int): ISO 8601 year (may differ from calendar year)
        - weekday_iso (int): ISO weekday (1=Monday, 7=Sunday)
        - quarter (int): Quarter of the year (1-4)
        - days_in_month (int): Total days in the current month
        - hour (int): Current hour (0-23)
        - minute (int): Current minute (0-59)
        - second (int): Current second (0-59)
        - microsecond (int): Current microsecond (0-999999)