feat: implement US-1 - add print button to MonthCard with i18n support

- Add PrintButton component with card styling matching AddLocationButton
- Integrate print button next to "Add a new realestate" with centered layout
- Add English/Croatian translations for print tooltips and labels
- Implement click handler to open print preview in new tab
- Create Sprint Playbook for barcode print functionality

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

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

app/ui/PrintButton.tsx

@@ -0,0 +1,32 @@
+"use client";
+
+import { PrinterIcon } from '@heroicons/react/24/outline';
+import { useTranslations } from 'next-intl';
+import { YearMonth } from '../lib/db-types';
+
+export interface PrintButtonProps {
+  yearMonth: YearMonth;
+}
+
+export const PrintButton: React.FC<PrintButtonProps> = ({ yearMonth }) => {
+  const t = useTranslations("home-page.month-card");
+
+  const handlePrintClick = () => {
+    window.open(`/print/${yearMonth.year}/${yearMonth.month}`, '_blank');
+  };
+
+  return (
+    <div className="card card-compact card-bordered bg-base-100 shadow-s my-1">
+      <button 
+        className="card-body tooltip self-center cursor-pointer" 
+        onClick={handlePrintClick}
+        data-tip={t("print-codes-tooltip")}
+      >
+        <span className='flex self-center mr-[-3em]'>
+          <PrinterIcon className="h-[1em] w-[1em] cursor-pointer text-4xl" />
+          <span className="ml-1 mt-[.4em] text-xs text-left leading-[1.2em] w-[6em]">{t("print-codes-label")}</span>
+        </span>
+      </button>
+    </div>
+  );
+};