Added Postman collection with all APIs

[sumitst05]

Description

• Added Postman workspace export for all APIs.
• Includes collections representing individual API endpoints.
• Workspace organized with requests for various HTTP methods (GET, POST, PUT, DELETE).

Fixes

#458

Checklist

• Code follows project's style guidelines.
• Changes are documented appropriately.

Notes

For endpoints with the /list route, query parameters (page and filter) can be utilized to customize data retrieval. Omitting these parameters results in the listing of all available data.