feat: add Deskew PDF and Font to Outline tools with improved issue templates

New Features:
- Add Deskew PDF tool for straightening scanned/skewed PDF pages
- Add Font to Outline tool for converting text to vector paths
- Add translations for new tools in all supported locales (de, en, id, it, tr, vi, zh)

Improvements:
- Migrate GitHub issue templates from markdown to YAML forms
  - Separate templates for bug reports, feature requests, and questions
  - Add config.yml for issue template chooser
- Update sitemap.xml with new tool pages
- Update ghostscript loader and helper utilities

public/locales/de/tools.json

@@ -521,5 +521,13 @@
     "subtitle": "E-Mail-Dateien (EML, MSG) in PDF-Format konvertieren. Unterstützt Outlook-Exporte und Standard-E-Mail-Formate.",
     "acceptedFormats": "EML, MSG-Dateien",
     "convertButton": "In PDF konvertieren"
+  },
+  "fontToOutline": {
+    "name": "Schriftart zu Umriss",
+    "subtitle": "Alle Schriftarten in Vektorumrisse für konsistente Darstellung auf allen Geräten konvertieren."
+  },
+  "deskewPdf": {
+    "name": "PDF entzerren",
+    "subtitle": "Automatisch schiefe gescannte Seiten mit OpenCV begradigen."
   }
 }