feat(showcase): add rock paper scissors game showcase

Added a new showcase entry for the Rock Paper Scissors game built with Aurelia 2. Includes an overview, technical stack details, and implementation insights to highlight its features and design.

content/showcase/rock-paper-scissors/index.md

@@ -0,0 +1,23 @@
+---
+title: "Rock Paper Scissors"
+description: "A classic Rock Paper Scissors game built with Aurelia 2, featuring an elegant UI and computer opponent."
+date: 2024-03-15
+showcase_categories: ["games"]
+github: "your-username/rock-paper-scissors"
+demo: "https://your-demo-url.com"
+---
+
+## Overview
+
+Rock Paper Scissors is a modern take on the classic hand game, built with Aurelia 2. The game features a clean, intuitive interface and an intelligent computer opponent. Perfect for learning Aurelia 2 basics while creating something fun and interactive.
+
+## Technical Stack
+
+- **Frontend**: Aurelia 2
+- **Styling**: TailwindCSS for responsive design
+- **Icons**: Font Awesome 5
+- **Animations**: CSS transitions and transforms
+
+## Implementation Details
+
+The game leverages Aurelia 2's powerful binding system and component architecture to create a seamless gaming experience. The computer opponent uses a simple yet effective random selection algorithm, while the UI updates in real-time to reflect the game state.