feat(pdf): add print FAB + fix color-mix via clean clone approach

- Added secondary FAB button 'Печать' with printer icon (window.print)
- Created printer.svg icon for the print button
- Added .fab-secondary__ico--print CSS class
- Fixed html2pdf color-mix() issue: buildCleanClone() creates a deep clone
  with all computed styles inlined, all stylesheets removed, and
  pseudo-elements converted to real DOM elements before passing to html2pdf
- Two separate handlers: pdfBtn for download, printBtn for print dialog

src/partials/fab-stack-resume.html

@@ -4,4 +4,7 @@
         <span class="fab__label">Скачать в PDF</span>
         <span class="fab__spinner" aria-hidden="true"></span>
       </button>
-    </div>
+      <button type="button" class="fab fab--secondary" data-resume-print-btn aria-label="Печать резюме">
+        <span class="fab-secondary__ico fab-secondary__ico--print" aria-hidden="true"></span>
+      </button>
+    </div>