feat: Implement user authentication and database migration system

- Refactored AuthService to use UserRepository for user authentication.
- Added .env file for environment configuration.
- Created migration system with Migrator and ConnectionFactory classes.
- Added database migration files for creating users table.
- Implemented settings controller for managing database migrations.
- Developed user repository for user data handling.
- Created users controller for user management interface.
- Added frontend standards and migration documentation.
- Introduced reusable UI components and jQuery alerts module.

package.json

@@ -6,6 +6,8 @@
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "build:css": "sass --style=compressed --no-source-map resources/scss/app.scss public/assets/css/app.css && sass --style=compressed --no-source-map resources/scss/login.scss public/assets/css/login.css",
+    "build:modules": "sass --style=compressed --no-source-map resources/modules/jquery-alerts/jquery-alerts.scss public/assets/css/modules/jquery-alerts.css && copy /Y resources\\modules\\jquery-alerts\\jquery-alerts.js public\\assets\\js\\modules\\jquery-alerts.js",
+    "build:assets": "npm run build:css && npm run build:modules",
     "watch:css": "sass --watch --style=expanded --no-source-map resources/scss/app.scss:public/assets/css/app.css resources/scss/login.scss:public/assets/css/login.css"
   },
   "keywords": [],