Refactor Infrastructure Layer to Improve Code Organization

The commit refactors the infrastructure layer to enhance maintainability by introducing a clear separation of concerns and standardizing naming conventions. Specifically, the changes include:

- Extracting the data access logic into an `IRepository` interface.
- Creating separate projects for different types of data (e.g., `BlogData` vs. `User`).
- Renaming the shared services to follow a consistent naming convention.
- Adding documentation comments for each service and repository.

These changes aim to improve the code organization, making it easier to understand and maintain in the long run.

Author: 9034725985