Add documentation for App facade (#92)

* Add documentation for App facade

* Rename app.md to application.md and update section titles for clarity

Author: WINBIGFOX

resources/views/docs/desktop/1/the-basics/application.md

@@ -0,0 +1,128 @@
+---
+title: Application
+order: 250
+---
+
+## Application
+
+The `App` facade allows you to perform basic operations with the Electron app.
+
+Note: Some methods are only available on specific operating systems and are labeled as such.
+
+To use the `App` facade, add the following to the top of your file:
+
+```php
+use Native\Laravel\Facades\App;
+```
+
+### Quit the app
+
+To quit the app, use the `quit` method:
+
+```php
+App::quit();
+```
+
+### Focus the app
+
+To focus the app, use the `focus` method.
+
+On Linux, it focuses on the first visible window. On macOS, it makes the application the active one. On Windows, it
+focuses on the application's first window.
+
+```php
+App::focus();
+```
+
+### Hide the app
+_Only available on macOS_
+
+The `hide` method will hide all application windows without minimizing them. This method is only available on macOS.
+
+```php
+App::hide();
+```
+
+### Check if the app is hidden
+_Only available on macOS_
+
+To check if the app is hidden, use the `isHidden` method. This method is only available on macOS.
+
+Returns a boolean: `true` if the application—including all its windows—is hidden (e.g., with Command-H), `false`
+otherwise.
+
+```php
+$isHidden = App::isHidden();
+```
+
+### Current Version
+
+To get the current app version, use the `version` method. The version is defined in the `config/nativephp.php` file.
+
+```php
+$version = App::version();
+```
+
+### App Badge Count
+_Only available on macOS and Linux_
+
+You can set the app's badge count.
+On macOS, it shows on the dock icon. On Linux, it only works for Unity launcher.
+
+To set the badge count, use the `badgeCount` method:
+
+```php
+App::badgeCount(5);
+```
+
+To remove the badge count, use the `badgeCount` method with `0` as the argument:
+
+```php
+App::badgeCount(0);
+```
+
+To get the badge count, use the `badgeCount` method without any arguments:
+
+```php
+$badgeCount = App::badgeCount();
+``` 
+
+### Recent documents list
+_Only available on macOS and Windows_
+
+The recent documents list is a list of files that the user has recently opened. This list is available on macOS and
+Windows.
+
+To add a document to the recent documents list, use the `addRecentDocument` method:
+
+```php
+App::addRecentDocument('/path/to/document');
+```
+
+To clear the recent documents list, use the `clearRecentDocuments` method:
+
+```php
+App::clearRecentDocuments();
+```
+
+### Open at login
+_Only available on macOS and Windows_
+
+To enable 'open at login', use the `openAtLogin` method:
+
+```php
+App::openAtLogin(true);
+```
+
+To disable open at login, use the `openAtLogin` method with `false` as the argument:
+
+```php
+App::openAtLogin(false);
+```
+
+To check if the app is set to open at login, use the `openAtLogin` method without any arguments:
+
+```php
+$isOpenAtLogin = App::openAtLogin();
+```
+