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_modules/m_frontend/m_file/thumb.php

@@ -0,0 +1,52 @@
+<?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.
+|*******************************************************************************************************************/
+
+define('_ISVALID', true);
+
+set_time_limit(0);
+
+$main_dir = realpath(dirname(__FILE__) . '/../../../');
+set_include_path($main_dir);
+
+include_once 'f_core/config.core.php';
+
+$type      = null;
+$user_key  = null;
+$file_key  = null;
+$thumbnail = null;
+
+if ($i = rawurldecode($_GET["_"]) and $d = json_decode(secured_decrypt($i), true)) {
+    $type     = $class_filter->clr_str($d[0]);
+    $user_key = (int) $d[1];
+    $file_key = (int) $d[2];
+
+    if ($type and $user_key and $file_key) {
+        $tbl = sprintf("db_%sfiles", $type);
+        $get = $db->execute(sprintf("SELECT `db_id`, `thumb_cache`, `thumb_server` FROM `%s` WHERE `file_key`='%s' LIMIT 1;", $tbl, $file_key));
+
+        if ($get->fields["db_id"]) {
+            $thumb_server = $get->fields["thumb_server"];
+            $thumb_cache  = $get->fields["thumb_cache"];
+            $thumb_cache  = $thumb_cache > 1 ? $thumb_cache : null;
+            $thumbnail    = VGenerate::thumbSigned($type, $file_key, array($user_key, $thumb_cache), (3600 * 24), 0, 0);
+
+            if ($thumbnail) {
+                header("Location: " . $thumbnail);
+            }
+        }
+    }
+} else {
+    header("Location: " . $cfg["global_images_url"] . '/logo-mail.png');
+}