Implement Feedback Management System with CRUD Operations and API Enhancements

- Introduced a new feedback management system, including the creation of feedback entities, services, and repositories.
- Implemented CRUD operations for feedback, allowing users to submit likes and dislikes on tenders.
- Developed administrative endpoints for listing and retrieving feedback with comprehensive filtering options.
- Enhanced public API to allow users to view feedback related to tenders.
- Updated Swagger documentation to reflect new feedback endpoints and their functionalities.
- Removed obsolete configuration file `config.yaml` as part of the transition to a modular configuration system.
- Ensured adherence to Clean Architecture principles throughout the implementation.

internal/feedback/errors.go

@@ -0,0 +1,19 @@
+package feedback
+
+import "errors"
+
+// Custom errors for feedback domain
+var (
+	ErrFeedbackNotFound      = errors.New("feedback not found")
+	ErrFeedbackAlreadyExists = errors.New("feedback already exists for this tender and user")
+	ErrInvalidFeedbackType   = errors.New("invalid feedback type")
+	ErrInvalidRating         = errors.New("invalid rating value")
+	ErrInvalidComment        = errors.New("invalid comment")
+	ErrInvalidDateRange      = errors.New("invalid date range: date_from must be before date_to")
+	ErrUnauthorizedAccess    = errors.New("unauthorized access to feedback")
+	ErrFeedbackDeleted       = errors.New("feedback has been deleted")
+	ErrTenderNotFound        = errors.New("tender not found")
+	ErrUserNotFound          = errors.New("user not found")
+	ErrCustomerNotFound      = errors.New("customer not found")
+	ErrCompanyNotFound       = errors.New("company not found")
+)