Add multi-file page support and improve documentation

Update README to explain multi-file page functionality Add example
content files demonstrating the feature Improve folder type detection
logic Implement new routing for page-type folders Add support for mixed
content types in single pages Update navigation and metadata handling
for multi-file pages Remove legacy frontpage.php in favor of multi-file
approach Improve file-based routing documentation Add examples of
different content types working together Update router to handle
multi-file content rendering Implement proper sorting of content files
Add best practices for multi-file content organization

app/default/content/articles/2025-11-02-multi-file-content/00-introduction.md

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+# Multi-File Content Pages
+
+One of FolderWeb's most powerful features is the ability to compose a single page from multiple content files. This gives you flexibility in how you organize and author your content.
+
+## How It Works
+
+When a folder contains **no subdirectories**, FolderWeb treats it as a **page-type folder**. All `.md`, `.html`, and `.php` files in that folder are rendered in **alphanumerical order**.
+
+This means you can:
+
+- Break long content into manageable sections
+- Mix file formats freely (Markdown, HTML, PHP)
+- Reorder sections by renaming files
+- Include dynamic PHP content alongside static content

app/default/content/articles/2025-11-02-multi-file-content/01-examples.md

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+## File Naming Examples
+
+Here are some example naming patterns:
+
+```
+/my-page/
+  00-introduction.md
+  01-getting-started.md
+  02-advanced-topics.html
+  03-conclusion.php
+```
+
+Files render in this order:
+1. `00-introduction.md`
+2. `01-getting-started.md`
+3. `02-advanced-topics.html`
+4. `03-conclusion.php`
+
+## Folder Types
+
+FolderWeb automatically determines folder type:
+
+- **Page-type folder**: No subdirectories → Renders all content files as a single page
+- **Article-type folder**: Has subdirectories → Shows list view with links to subdirectories

app/default/content/articles/2025-11-02-multi-file-content/02-use-cases.html

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+<article>
+<h2>Use Cases</h2>
+
+<h3>Long Documentation</h3>
+<p>Break lengthy documentation into logical sections. Each section gets its own file, making editing and maintenance easier.</p>
+
+<h3>Mixed Content Types</h3>
+<p>Use Markdown for simple text, HTML for complex layouts, and PHP for dynamic content—all on the same page.</p>
+
+<h3>Collaborative Editing</h3>
+<p>Multiple authors can work on different sections simultaneously without merge conflicts.</p>
+
+<h3>Progressive Enhancement</h3>
+<p>Start with simple Markdown files. Later, enhance specific sections with HTML or PHP without restructuring.</p>
+</article>

app/default/content/articles/2025-11-02-multi-file-content/03-dynamic-demo.php

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+<article>
+<h2>Dynamic Content Example</h2>
+
+<p>This section is a PHP file that generates dynamic content. Here are some examples:</p>
+
+<div style="background: #f0f9ff; border: 1px solid #0284c7; padding: 1.5rem; border-radius: 8px; margin: 1.5rem 0;">
+    <h3>Server Information</h3>
+    <ul style="list-style: none; padding: 0;">
+        <li><strong>Current Time:</strong> <?= date('H:i:s') ?></li>
+        <li><strong>Today's Date:</strong> <?= date('l, F j, Y') ?></li>
+        <li><strong>PHP Version:</strong> <?= PHP_VERSION ?></li>
+    </ul>
+</div>
+
+<p>PHP files can access all the same variables and functions available throughout FolderWeb, making it easy to create dynamic, data-driven content.</p>
+</article>

app/default/content/articles/2025-11-02-multi-file-content/04-best-practices.md

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+## Best Practices
+
+### Use Descriptive Prefixes
+
+Number your files with two-digit prefixes (`00-`, `01-`, `02-`) to maintain clear ordering:
+
+- Allows up to 100 sections before needing three digits
+- Keeps files sorted in file managers
+- Makes reordering easy (just rename)
+
+### Choose the Right Format
+
+- **Markdown (`.md`)** - For most content. Simple, clean, readable.
+- **HTML (`.html`)** - For complex layouts or embedded media.
+- **PHP (`.php`)** - For dynamic content, calculations, or data display.
+
+### Keep It Simple
+
+Don't overcomplicate. If your page works well as a single file, keep it that way. Use multiple files when they genuinely make maintenance easier.
+
+---
+
+**This article itself demonstrates the multi-file approach.** View the source folder to see how it's structured!

app/default/content/articles/2025-11-02-multi-file-content/metadata.ini

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+title = "Multi-File Content Pages"
+date = "2025-11-02"
+summary = "Learn how to create pages from multiple content files in any format"