feat: Add template coursemap for CourseFlow

[Duy-Nguyen1104]

Description

This PR adds a comprehensive Rake task (rake db:test_data:create_frontend_data) to populate the development database with realistic test data for frontend development. It includes the creation of user roles, a test convenor user, teaching periods, unit definitions and instances, a course (S326 - Bachelor of Information Technology), a course map, prerequisite relationships, and unit slotting data for visualization. This setup ensures a consistent and realistic environment for testing the Course Map UI and its data dependencies.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Rake task was executed successfully in a clean local development database.
• Verified that the created units, course, course map, and requirement relations appear correctly in the frontend and through backend API calls.
• Confirmed proper slotting of units
• Verified no duplicate entries are created on repeated runs
• Unit codes available for testing from the Rake task:

SIT102 – Introduction to Programming
SIT111 – Computer Systems
SIT182 – Real World Practices for Cyber Security
SIT112 – Introduction to Data Science and Artificial Intelligence
SIT103 – Database Fundamentals
SIT224 – Information Technology Systems and Innovation
SIT120 – Introduction to Responsive Web Apps
MIS201 – Digital Business Analysis
SIT216 – User-Centered Design
SIT317 – Information Technology Innovations and Entrepreneurship
SIT223 – Professional Practice in Information Technology
SIT374 – Team Project (A) - Project Management and Practices
SIT328 – Communicating Information Technology Projects
SIT344 – Professional Practice
SIT232 – Object-Oriented Development
SIT323 – Cloud Native Application Development

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have created or extended unit tests to address my new additions

[giangnht19]

I have migrated a new database and courses have been successfully populated

[martindolores]

Great stuff! I was able to populate my DB with the test data and confirm that the data is showing. Awesome work 🤘

[BrianDangDev]

Close this PR since it's behind this one PR#71