Added unit tests for Layout.py

docs/Layout.md

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+# Layout control
+
+## Overview
+
+This component renders the global layout of the application.
+This is only one instance per session.
+
+## State
+
+| Name                 | Type    | Description                      | Default |
+|----------------------|---------|----------------------------------|---------|
+| `left_drawer_open`   | boolean | True if the left drawer is open  | True    |
+| `right_drawer_open`  | boolean | True if the right drawer is open | True    |
+| `left_drawer_width`  | integer | Width of the left drawer         | 250     |
+| `right_drawer_width` | integer | Width of the right drawer        | 250     |
+
+## Commands
+
+| Name                                    | Description                                                                            |
+|-----------------------------------------|----------------------------------------------------------------------------------------|
+| `toggle_drawer(side)`                   | Toggles the drawer on the specified side                                               |
+| `update_drawer_width(side, width=None)` | Updates the drawer width on the specified side. The width is given by the HTMX request |
+
+## Ids
+
+| Name        | Description       |
+|-------------|-------------------|
+| `layout`    | Singleton         |
+| `layout_h`  | header            |
+| `layout_hl` | header left side  |
+| `layout_hr` | header right side |
+| `layout_f`  | footer            |
+| `layout_fl` | footer left side  |
+| `layout_fr` | footer right side |
+| `layout_ld` | left drawer       |
+| `layout_rd` | right drawer      |
+
+## High Level Hierarchical Structure
+```
+MyFastHtml
+├── src
+│   ├── myfasthtml/             # Main library code
+│   │   ├── core/commands.py    # Command definitions
+│   │   ├── controls/button.py  # Control helpers
+│   │   └── pages/LoginPage.py  # Predefined Login page
+│   └── ...
+├── tests                       # Unit and integration tests
+├── LICENSE                     # License file (MIT)
+├── README.md                   # Project documentation
+└── pyproject.toml              # Build configuration
+```