Process Messages (FrontEnd focused Full-Stack Eng :)

Problem Overview

• Build a function to determine the processing order of messages: higher priority first, and among equal priority, earlier timestamp first.
• Input: String[] messages in 'timestamp:priority' format (timestamp 0000-9999; priority 1-5). Output: String[] ordered accordingly.
• Real-world context: processing in a messaging system for a frontend-focused full-stack app.
• This coding interview problem is an interview question from Unknown interviews.