revert: add Blade directive for rendering user initials

- Introduced `DirectiveServiceProvider` to register custom Blade directives.
- Added `@initials` directive to generate and display uppercase initials from a given string.
- Registered the service provider in `bootstrap/providers.php`.

app/Providers/DirectiveServiceProvider.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Providers;
+
+use Illuminate\Support\Facades\Blade;
+use Illuminate\Support\ServiceProvider;
+
+final class DirectiveServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap services.
+     */
+    public function boot(): void
+    {
+        $this->registerInitialsDirective();
+    }
+
+    private function registerInitialsDirective(): void
+    {
+        Blade::directive('initials', fn ($expression) => "<?php
+            echo implode('', array_map(function(\$w) {
+                return strtoupper(\$w[0] ?? '');
+            }, explode(' ', $expression)));
+        ?>");
+    }
+}

bootstrap/providers.php

@@ -5,4 +5,5 @@
 return [
     App\Providers\AppServiceProvider::class,
     App\Providers\FortifyServiceProvider::class,
+    App\Providers\DirectiveServiceProvider::class,
 ];