modified: serv_nginx/api_bb/internal/handlers/handlers.go

new file:   serv_nginx/api_bb/internal/handlers/user_workout_handler.go
	modified:   serv_nginx/api_bb/internal/models/workout.go
	modified:   serv_nginx/api_bb/internal/repository/workout_repository.go
	modified:   serv_nginx/api_bb/internal/routes/routes.go
	new file:   serv_nginx/api_bb/internal/service/user_workout_service.go
	new file:   serv_nginx/api_bb/pkg/utils/response.go
	new file:   serv_nginx/api_bb/pkg/utils/validation.go
add workout EndPoints for workout struct, CRUD operations and logics

serv_nginx/api_bb/internal/repository/workout_repository.go

@@ -3,6 +3,7 @@ package repository
 
 import (
 	"api_bb/internal/models"
+	"errors"
 	"fmt"
 	"time"
 
@@ -26,6 +27,10 @@ type workoutRepository struct {
 	db *gorm.DB
 }
 
+var (
+	ErrNotFound = errors.New("record not found")
+)
+
 func NewWorkoutRepository(db *gorm.DB) WorkoutRepository {
 	return &workoutRepository{db: db}
 }