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.language.php

@@ -0,0 +1,37 @@
+<?php
+/*******************************************************************************************************************
+| Software Name        : EasyStream
+| Software Description : High End YouTube Clone Script with Videos, Shorts, Streams, Images, Audio, Documents, Blogs
+| Software Author      : (c) Sami Ahmed
+|*******************************************************************************************************************
+|
+|*******************************************************************************************************************
+| This source file is subject to the EasyStream Proprietary License Agreement.
+| 
+| By using this software, you acknowledge having read this Agreement and agree to be bound thereby.
+|*******************************************************************************************************************
+| Copyright (c) 2025 Sami Ahmed. All rights reserved.
+|*******************************************************************************************************************/
+
+defined('_ISVALID') or header('Location: /error');
+
+class VLanguage
+{
+    public $language_file;
+    /* include language file */
+    public function setLanguageFile($section, $short_filename)
+    {
+        global $cfg;
+
+        $_l = $section == 'frontend' ? 'fe_lang' : 'be_lang';
+
+        return $this->language_file = 'f_data/data_languages/' . $_SESSION[$_l] . '/lang_' . $section . '/' . $short_filename . '.php';
+    }
+    /* get a language entry */
+    public function getLanguageEntry($array_key)
+    {
+        global $language;
+
+        return $language[$array_key];
+    }
+}