add hierarchical model

[satyam0827]

🚀 Pull Request

Description

According to Concept_node.md file i have added required models for that below is the list of models I have added :

1. Organization Model
2. Enhanced User Model
3. Event Model
4. Task Model
5. TaskSubmission Model
6. Shop Item Model
7. Purchase Model
8. Point Transaction Model

Related Issue

Link the issue this PR closes or addresses

Example: Closes #42

Type of Change

• Bug fix 🐛
• New feature 🌟
• Enhancement ⚡
• Documentation update 📚
• Refactoring ♻️

How Has This Been Tested?

The code has been tested on local server.

Relationships

Organization (1) ←→ (Many) Users
Organization (1) ←→ (Many) Events
Organization (1) ←→ (Many) ShopItems
Event (1) ←→ (Many) Tasks
Task (1) ←→ (Many) TaskSubmissions
User (1) ←→ (Many) TaskSubmissions
User (1) ←→ (Many) PointTransactions
User (1) ←→ (Many) Purchases

Include screenshots of UI changes, error fixes, or new features

Checklist

• I followed the Contributing Guide
• My code follows the project’s style guidelines
• I performed a self-review of my code
• I updated documentation where necessary
• My changes generate no new warnings

[DeadIndian]

Why did you remove this?

[DeadIndian]

Im going to merge this pr this time. but dont touch un-related code from next time ;)