Add new PRD for Automated Rental Key And Messaging System

[palladius]

This PR adds a new Product Requirements Document as discussed in issue #139.

[palladius]

@gemini-cli Generate an Astro frontend application referencing the PRD. Ensure it works with some basic testing. Once done, run the app and please take a screenshot via Playwright of the rendered application and attach it to this PR.

[github-actions]

@palladius I've received your request and I'm working on it now! 💛

[github-actions]

Plan

• Read the PRD file from issue Automated Rental Key And Messaging System #139.
• Create a new Astro application named 'automated-rental-key-and-messaging-system-app' in the 'random-app-ideas' directory.
• Implement the frontend based on the PRD.
• Add basic tests.
• Run the application.
• Take a screenshot of the running application using Playwright.
• Attach the screenshot to the PR.
• Commit and push the changes.

[github-actions]

Here is a screenshot of the running application:

[github-actions]

I have generated the Astro frontend application and included a screenshot.

Here is how you can run the application locally:

# Clone the repository
git clone https://github.com/palladius/booth-ideas-sg

# Navigate into the repository directory
cd booth-ideas-sg

# Switch to the correct branch
git checkout automated-rental-key-and-messaging-system

# Navigate into the application directory
cd random-app-ideas/140--automated-rental-key-and-messaging-system-app

# Install dependencies
npm install

# Run the development server
npm run dev