Store Module - Add Store

**Checklist**

- [x] Store Model
- [x] Store DAO - addStore
- [x] Store Service - addStore
- [x] Store Validator

**Estimated Time**

8 hours

**Actual Time**

- Store Model: 1 hours
- Store Validator: 4 hours
- Store DAO: 3 hours
- Store Service: 1 hours

**Progress**

- Store Model: Created the Store class with required attributes and methods. Implemented data validation logic.
- Store Validator: Developed input validation function to ensure the store data is accurate and complete.
- Store DAO: Set up the database connection. Implemented the 'add store' method to insert store data in the database.
- Store Service: Created the service layer to handle business logic. Added the 'add store' method to interact with DAO and perform validation.

**Completion Steps**

- [x] Code review and testing
- [x] Push the code to GitHub
- [x] Close this issue

**Labels**

- Estimation
- Actual Time
- In Progress
- Completed

The issue names the Store Model, Store Validator, Store DAO, and Store Service, with addStore as the entry point. Review those components and the database connection first; the work is done when store data is validated, inserted through the DAO, and handled by the service, but the checklist says these steps are already complete.

索引モデルが issue の本文から書いたものです。