feat: adds files for lesson 25 homework

lesson_25/db/db_app/src/main/resources/queries/evanderblue.sql

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+-- Query 1: Count of media items by type
+SELECT type, COUNT(*)
+FROM media_items
+GROUP BY type;
+
+-- Query 2: Sum of total pages checked out by guests
+SELECT SUM(pages)
+FROM guests;
+
+-- Query 3: Show all guests and any corresponding records in checked_out_items table
+SELECT g.*, c.item_id, c.due_date
+FROM guests g
+LEFT JOIN checked_out_items c ON g.email = c.email;
+
+-- Query 4: Create library_users table
+CREATE TABLE library_users (
+    id TEXT PRIMARY KEY,
+    email TEXT UNIQUE NOT NULL,
+    first_name TEXT NOT NULL,
+    last_name TEXT NOT NULL,
+    password TEXT NOT NULL
+);
+
+-- Query 5: Populate library_users table with sample data
+INSERT INTO library_users (id, email, first_name, last_name, password) VALUES
+('550e8400-e29b-41d4-a716-446655440001', 'john.doe@example.com', 'John', 'Doe', '$2b$10$abcdefghijklmnopqrstuvwxyz123456'),
+('550e8400-e29b-41d4-a716-446655440002', 'jane.smith@example.com', 'Jane', 'Smith', '$2b$10$bcdefghijklmnopqrstuvwxyz234567'),
+('550e8400-e29b-41d4-a716-446655440003', 'mike.johnson@example.com', 'Mike', 'Johnson', '$2b$10$cdefghijklmnopqrstuvwxyz345678'),
+('550e8400-e29b-41d4-a716-446655440004', 'sarah.wilson@example.com', 'Sarah', 'Wilson', '$2b$10$defghijklmnopqrstuvwxyz456789'),
+('550e8400-e29b-41d4-a716-446655440005', 'david.brown@example.com', 'David', 'Brown', '$2b$10$efghijklmnopqrstuvwxyz567890');