Creation of database structs

[mishtuu]

Creation of packages inside monolith

• Payments (package) [endpoint.go, service.go, dao.go, model.go]
• Order (package) -> [endpoint.go, service.go, dao.go, model.go]

Creation of database model for: 1) Payments 2) Order 3) Payment Configurations 4) Payment Method 5) Payment Gateway 6) Third Party Token