Feat: adds amiyah jones' script file, lesson 28

lesson_28/db/db_app/src/main/java/com/codedifferently/lesson28/models/LibraryUserModel.java

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+package com.codedifferently.lesson28.models;
+
+import java.util.UUID;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "library_users")
+public class LibraryUserModel {
+    @Id public String id;
+    public String email;
+    public String first_name;
+    public String last_name;
+    public String password;
+
+    public LibraryUserModel() {
+        this.id = UUID.randomUUID().toString();
+    }
+}

lesson_28/db/db_app/src/main/java/com/codedifferently/lesson28/repository/LibraryUserRepository.java

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+package com.codedifferently.lesson28.repository;
+
+import java.util.List;
+
+import org.springframework.data.repository.CrudRepository;
+
+import com.codedifferently.lesson28.models.LibraryUserModel;
+
+public interface LibraryUserRepository extends CrudRepository<LibraryUserModel, String>{
+  @Override
+  List<LibraryUserModel> findAll();
+}

lesson_28/db/db_app/src/main/resources/queries/amiyahjones.sql

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+--  returns the counts of media items by type.
+SELECT 
+  type, COUNT(*) AS item_count
+FROM 
+  media_items
+GROUP BY 
+  type;
+
+-- returns the sum of total pages checked out by guests.
+SELECT 
+  SUM(media_items.pages) AS total_pages
+FROM 
+  media_items
+  inner join checked_out_items ch on media_items.id = ch.item_id
+WHERE
+  media_items.pages IS NOT NULL;
+
+-- shows all 5 guests 
+-- and any corresponding records in the checked_out_items table
+SELECT 
+  guests.name , 
+  ch.email,
+  ch.item_id , 
+  ch.due_date
+FROM 
+  guests 
+inner join checked_out_items ch on guests.email = ch.email;