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/config.language.php

@@ -0,0 +1,40 @@
+<?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');
+
+/* languages array */
+function langTypes()
+{
+    global $db;
+
+    $_cache = false;
+    $_time  = 3600 * 6; //6 hours
+
+    $sql = sprintf("SELECT `lang_id`, `lang_name`, `lang_flag`, `lang_default` FROM `db_languages` WHERE `lang_active`='1';");
+    $r   = $_cache ? $db->CacheExecute($_time, $sql) : $db->execute($sql);
+
+    $_lang = array();
+
+    if ($r->fields["lang_id"]) {
+        while (!$r->EOF) {
+            $_lang[$r->fields["lang_id"]] = array("lang_name" => $r->fields["lang_name"], "lang_flag" => $r->fields["lang_flag"], "lang_default" => $r->fields["lang_default"]);
+
+            $r->MoveNext();
+        }
+    }
+
+    return $_lang;
+}