Add cookbook recipe for implementing advanced app structure with Yii3

[Copilot]

Provides step-by-step guidance for structuring a Yii3 application with multiple entry points for frontend, backend, console, and API applications using the advanced application template pattern.

Recipe Contents

• Multiple entry points: Separate entry scripts for frontend (index.php), backend (admin.php), and API applications with configuration-based separation
• Configuration structure: Config plugin setup for admin, web, api, and console configurations with shared common config
• Source organization: Directory structure pattern with src/{Admin,Frontend,Api,Shared} for separation while enabling code reuse
• Access control: Middleware-based authentication for admin areas
• Environment management: Using .env files and environment-specific parameters
• Best practices: Recommendations for maintaining the structure

Example Entry Point Pattern

// public/admin.php
$runner = new HttpApplicationRunner(
    rootPath: $rootPath,
    debug: YII_DEBUG,
    environment: YII_ENV,
    bootstrap: require $rootPath . '/config/bootstrap.php',
    configPaths: new ConfigPaths($rootPath, 'config', 'admin'),
);
$runner->run();

Configuration Plugin Setup

{
    "config-plugin": {
        "admin": ["$common", "config/admin/*.php"],
        "web": ["$common", "config/web/*.php"],
        "api": ["$common", "config/api/*.php"]
    }
}

The recipe demonstrates how to achieve application separation through configuration and middleware while maintaining clear organizational structure in Yii3.

Original prompt

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This section details on the original issue you should resolve

<issue_title>A cookbook reciple about implementing Yii2 advanced app structure with Yii3</issue_title>
<issue_description>### Description

Need a cookbook explaining how to replicate Yii2 [yiisoft/yii2-app-basic](https://github.com/yiisoft/yii2-app-advanced) using Yii3 step by step.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes A cookbook reciple about implementing Yii2 advanced app structure with Yii3 #307

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[samdark]

@copilot That should not be an article about migration from Yii2 to Yii3 or a comparison of these two. It should be about using the same structure as in Yii2 but in Yii3.

[Copilot]

@copilot That should not be an article about migration from Yii2 to Yii3 or a comparison of these two. It should be about using the same structure as in Yii2 but in Yii3.

Refactored the article to focus purely on implementing the advanced app structure pattern in Yii3. Removed all migration/comparison content including the "Understanding the differences" and "Migration from Yii2" sections. The article now shows how to set up the structure without comparing frameworks. (94c6d81)