refactor: replace inline note with callout component for consistency

- Use x-callout component in developer view for env var note
- Simplify label text from "Comment (Optional)" to "Comment"
- Minor code formatting improvements via Pint

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

resources/views/livewire/project/shared/environment-variable/add.blade.php

@@ -16,7 +16,7 @@
         </div>
     @endif
 
-    <x-forms.input id="comment" label="Comment (Optional)"
+    <x-forms.input id="comment" label="Comment"
         helper="Add a note to document what this environment variable is used for." maxlength="256" />
 
     @if (!$shared)