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/en/tools.json

@@ -521,5 +521,13 @@
     "subtitle": "Convert email files (EML, MSG) to PDF format. Supports Outlook exports and standard email formats.",
     "acceptedFormats": "EML, MSG files",
     "convertButton": "Convert to PDF"
+  },
+  "fontToOutline": {
+    "name": "Font to Outline",
+    "subtitle": "Convert all fonts to vector outlines for consistent rendering across all devices."
+  },
+  "deskewPdf": {
+    "name": "Deskew PDF",
+    "subtitle": "Automatically straighten tilted scanned pages using OpenCV."
   }
 }