Add installation block to plugins pages

Author: luzrain

docs/plugins/file-monitor.md

@@ -7,6 +7,14 @@ title: File Monitor
 The File Monitor Plugin is designed to monitor specified directories for file changes.
 It automatically reloads workers whenever a file within those directories is modified.
 
+## Installation
+
+```bash
+$ composer require phpstreamserver/file-monitor
+```
+
+## Example of usage
+
 ```php title="server.php"
 use PHPStreamServer\Core\Plugin\Supervisor\WorkerProcess;
 use PHPStreamServer\Core\Server;
@@ -33,6 +41,8 @@ $server->addWorker(
 exit($server->run());
 ```
 
+## Configuration
+
 ### 🔌 FileMonitorPlugin
 
 | Option  | Type                     | Default         | Description                                                            |

docs/plugins/http-server.md

@@ -6,6 +6,14 @@ title: Http Server
 
 The HTTP Server Plugin provides an asynchronous HTTP server and includes additional reload strategies.
 
+## Installation
+
+```bash
+$ composer require phpstreamserver/http-server
+```
+
+## Example of usage
+
 ```php title="server.php"
 use Amp\Http\Server\HttpErrorException;
 use Amp\Http\Server\Request;
@@ -45,6 +53,8 @@ $server->addWorker(
 exit($server->run());
 ```
 
+## Configuration
+
 ### 🔌 HttpServerPlugin
 
 | Option                  | Type   | Default | Description                                                                        |

docs/plugins/logger.md

@@ -7,6 +7,14 @@ title: Logger
 The Logger Plugin provides configurable logging capabilities for your application.
 It allows you to route logs to multiple destinations, including files, stdout, syslog, and external services like Graylog.
 
+## Installation
+
+```bash
+$ composer require phpstreamserver/logger
+```
+
+## Example of usage
+
 ```php title="server.php"
 use PHPStreamServer\Core\Plugin\Supervisor\WorkerProcess;
 use PHPStreamServer\Core\Server;
@@ -33,6 +41,8 @@ $server->addWorker(
 exit($server->run());
 ```
 
+## Configuration
+
 ### 🔌 LoggerPlugin
 
 | Option     | Type                           | Default         | Description                                                          |

docs/plugins/metrics.md

@@ -9,6 +9,14 @@ It offers several built-in metrics for tracking server performance and activity,
 designed for their application needs.  
 The plugin supports Counter, Gauge, Histogram, and Summary metric types.
 
+## Installation
+
+```bash
+$ composer require phpstreamserver/metrics
+```
+
+## Example of usage
+
 ```php title="server.php"
 use PHPStreamServer\Core\Plugin\Supervisor\WorkerProcess;
 use PHPStreamServer\Core\Server;
@@ -46,6 +54,8 @@ $server->addWorker(
 exit($server->run());
 ```
 
+## Configuration
+
 ### 🔌 MetricsPlugin
 
 | Option   | Type           | Default        | Description                                           |

docs/plugins/scheduler.md

@@ -6,6 +6,14 @@ title: Scheduler
 
 The Scheduler Plugin enables you to schedule tasks at specified intervals, similar to the functionality of the traditional cron service.
 
+## Installation
+
+```bash
+$ composer require phpstreamserver/scheduler
+```
+
+## Example of usage
+
 ```php title="server.php"
 use PHPStreamServer\Core\Server;
 use PHPStreamServer\Plugin\Scheduler\PeriodicProcess;
@@ -30,6 +38,8 @@ $server->addWorker(
 exit($server->run());
 ```
 
+## Configuration
+
 ### 🔌 SchedulerPlugin
 
 This plugin does not have any specific configurable options.