Give the one-line text field its own stylesheet entry

<x-input> marks its field root data-md-input, and components/input.css
brings what it renders, the field and its icons, so an application
imports one file per component (plan step 36).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

resources/css/components/input.css

@@ -0,0 +1,13 @@
+/*
+ * <x-input>: M3's one-line text field (resources/views/components/input.blade.php).
+ *
+ * Nothing of its own to draw: the outlined and filled chrome, the floating label, the prefix and
+ * suffix, the clear and copy buttons and the character counter are the field's
+ * (components/field.css), and its icons are <x-icon>s. The field's root carries `data-md-input`
+ * for an application that wants to tell a one-line field from the others.
+ */
+
+@layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;
+
+@import './field.css';
+@import './icon.css';