Unify primary buttons with gradient pill design across the app.

Add shared btn-primary components and plus icons on create/new actions for a consistent Ladill UI.

Co-authored-by: Cursor <cursoragent@cursor.com>

resources/views/components/btn/create.blade.php

@@ -0,0 +1,17 @@
+@props([
+    'href' => null,
+    'type' => 'button',
+])
+
+@php
+    $tag = $href ? 'a' : 'button';
+@endphp
+
+<{{ $tag }}
+    @if ($href) href="{{ $href }}" @endif
+    @if ($tag === 'button') type="{{ $type }}" @endif
+    {{ $attributes->class(['btn-primary']) }}
+>
+    <svg class="h-4 w-4 shrink-0" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" d="M12 4.5v15m7.5-7.5h-15"/></svg>
+    {{ $slot }}
+</{{ $tag }}>