fix: switch to PHP 8 syntax cos why not 😭

Author: mychidarko

src/themes/api/routes/_app.php

@@ -1,5 +1,3 @@
 <?php
 
-app()->get('/', function () {
-    response()->json(['message' => 'Congrats!! You\'re on Leaf MVC']);
-});
+app()->get('/', fn () => response()->json(['message' => 'Congrats!! You\'re on Leaf MVC']));

src/themes/api/routes/index.php

@@ -10,9 +10,7 @@
 | you set will be called when a 404 error is encountered
 |
 */
-app()->set404(function () {
-    response()->json('Resource not found', 404, true);
-});
+app()->set404(fn () => response()->json('Resource not found', 404, true));
 
 /*
 |--------------------------------------------------------------------------
@@ -24,9 +22,7 @@
 | you set will be called when a 500 error is encountered
 |
 */
-app()->setErrorHandler(function () {
-    response()->json('An error occured, our team has been notified', 500, true);
-});
+app()->setErrorHandler(fn () => response()->json('An error occured, our team has been notified', 500, true));
 
 /*
 |--------------------------------------------------------------------------

src/themes/leaf3/index.php

@@ -2,8 +2,6 @@
 
 require __DIR__ . '/vendor/autoload.php';
 
-app()->get('/', function () {
-    response()->page('./welcome.html');
-});
+app()->get('/', fn () => response()->page('./welcome.html'));
 
 app()->run();