Feature/plugins versions check (#310)

* Check plugins versions from plugins.my-aac.org/api

* Improve plugin update check messaging

Updated the success message when checking for plugin updates to clarify the source. Added an informational message when outdated plugins are found to improve user feedback.

* Use configurable API URI for plugin updates

Replaces hardcoded plugin API URI with a configurable value from config, defaulting to the official API. Also fixes a typo in the success message.

system/src/Admin/Plugins.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace MyAAC\Admin;
+
+use GuzzleHttp\Client;
+
+class Plugins
+{
+	private string $api_base_uri = 'https://plugins.my-aac.org/api/';
+
+	public function getLatestVersions(): array
+	{
+		$client = new Client([
+			// Base URI is used with relative requests
+			'base_uri' => $this->api_base_uri,
+			// You can set any number of default request options.
+			'timeout'  => 3.0,
+		]);
+
+		$plugins = get_plugins(true);
+		foreach ($plugins as &$plugin) {
+			if (str_contains($plugin, 'disabled.')) {
+				$plugin = str_replace('disabled.', '', $plugin);
+			}
+		}
+
+		try {
+			$response = $client->get('get-latest-versions', [
+				'json' => ['plugins' => $plugins],
+			]);
+		}
+		catch (\Exception $e) {
+			error('API Error. Please try again later.');
+			return [];
+		}
+
+		$statusCode = $response->getStatusCode();
+		if ($statusCode != 200) {
+			throw new \Exception('Error getting info from plugins repository. Please try again later.');
+		}
+
+		$data = $response->getBody();
+		return json_decode($data, true);
+	}
+
+	public function setApiBaseUri(string $uri): void {
+		$this->api_base_uri = $uri;
+	}
+}