Enhance Torn Vault Tracker: Add documentation, improve exception handling, and update styles

- Updated .gitignore to exclude new directories and files.
- Enhanced config.php with detailed PHPDoc comments for better clarity.
- Refactored functions.php to include PHPDoc comments and improve code readability.
- Added custom exceptions in exceptions.php with detailed documentation.
- Improved utilities.php with better documentation and error handling.
- Updated index.php with structured comments and improved readability.
- Refined style.css for better visual consistency.
- Introduced phpcs.xml for coding style checks and standards enforcement.

config.php

@@ -1,10 +1,20 @@
 <?php
-// Configuration file for settings like database and API keys
+/**
+ * Configuration file for settings like database and API keys
+ *
+ * PHP version 8.1+
+ *
+ * @category Configuration
+ * @package  TornVaultTracker
+ * @author   Keith Solomon <ksolomon@gmail.com>
+ * @license  Unlicense https://unlicense.org/
+ * @link     https://github.com/ksolomon/TornVaultTracker
+ */
 
 // Database settings
 define('DB_DSN', 'sqlite:data/vault.db'); // Path to your SQLite database
-define('DB_USER', null); // Not needed for SQLite
-define('DB_PASSWORD', null); // Not needed for SQLite
+define('DB_USER', null);                  // Not needed for SQLite
+define('DB_PASSWORD', null);              // Not needed for SQLite
 
 // User-specific keys for accessing logs
 const USER_KEYS = [