Add CORS middleware and user database schema

- Implemented CORS middleware in the project to handle cross-origin requests.
- Added necessary files for the CORS package including README, LICENSE, and history documentation.
- Created a SQL schema for the users table with appropriate fields and constraints.
- Inserted mock data into the users table for testing purposes.

scheme.sql

@@ -0,0 +1,17 @@
+-- Table structure for the database
+CREATE TABLE users (
+    id INT PRIMARY KEY AUTO_INCREMENT,
+    username VARCHAR(50) NOT NULL UNIQUE,
+    first_name VARCHAR(50) NOT NULL,
+    last_name VARCHAR(50) NOT NULL,
+    email VARCHAR(100) NOT NULL UNIQUE,
+    password VARCHAR(255) NOT NULL,
+    created TIMESTAMP NOT NULL DEFAULT NOW()
+);
+
+-- Mock data for users
+INSERT INTO users (username, first_name, last_name, email, password)
+VALUES 
+('test1', 'John', 'Doe', 'jdoe@example.com', '1test'),
+('t', 'John', 'Doe', 'd@example.com', 'g'),
+('test2', 'Alice', 'Smith', 'asmith@example.com', '2test');