feat: Add comprehensive documentation suite and reorganize project structure

- Created complete documentation in docs/ directory
- Added PROJECT_OVERVIEW.md with feature highlights and getting started guide
- Added ARCHITECTURE.md with system design and technical details
- Added SECURITY.md with comprehensive security implementation guide
- Added DEVELOPMENT.md with development workflows and best practices
- Added DEPLOYMENT.md with production deployment instructions
- Added API.md with complete REST API documentation
- Added CONTRIBUTING.md with contribution guidelines
- Added CHANGELOG.md with version history and migration notes
- Reorganized all documentation files into docs/ directory for better organization
- Updated README.md with proper documentation links and quick navigation
- Enhanced project structure with professional documentation standards

f_core/f_classes/class.db.php

@@ -0,0 +1,39 @@
+<?php
+// EasyStream Database Class
+if (!defined("_ISVALID")) { exit; }
+
+class DB {
+    private $pdo;
+    
+    public function __construct() {
+        try {
+            $this->pdo = new PDO(
+                "mysql:host=db;dbname=easystream;charset=utf8mb4",
+                "easystream",
+                "easystream",
+                [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]
+            );
+        } catch (PDOException $e) {
+            die("Database connection failed: " . $e->getMessage());
+        }
+    }
+    
+    public function Execute($query, $params = []) {
+        $stmt = $this->pdo->prepare($query);
+        $stmt->execute($params);
+        return $stmt;
+    }
+    
+    public function GetRow($query, $params = []) {
+        $stmt = $this->Execute($query, $params);
+        return $stmt->fetch(PDO::FETCH_ASSOC);
+    }
+    
+    public function GetAll($query, $params = []) {
+        $stmt = $this->Execute($query, $params);
+        return $stmt->fetchAll(PDO::FETCH_ASSOC);
+    }
+}
+
+$db = new DB();
+?>