Achievement JPA entity added

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/user/Achievement.java

+package ntnu.idatt2016.v233.SmartMat.entity.user;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * Achievement is an entity class representing an achievement in the system.
+ *
+ * @author Anders
+ * @version 1.0
+ * @since 19.04.2023
+ *
+ */
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+@Entity(name = "achievement")
+public class Achievement {
+
+    @Id
+    @Column(name = "achievement_name")
+    private String achievementName;
+
+    @Column(name = "achievement_description")
+    private String achievementDescription;
+}