docs: update landing page tool count and AI model count

- Change "52 tools" to "51 tools" in 6 places (bento-grid heading,
  typing cursor, pricing, meta description, OG description, Twitter)
- Change "14 AI models" to "15" in FAQ page
- Add "Available in 21 languages" to pricing feature list

apps/landing/src/app/faq/page.tsx

@@ -31,7 +31,7 @@ const faqs = [
   {
     question: "What AI features are included?",
     answer:
-      "SnapOtter includes 14 local AI models for background removal, upscaling, OCR, face detection, colorization, noise removal, photo restoration, and more. All models run on your hardware.",
+      "SnapOtter includes 15 local AI models for background removal, upscaling, OCR, face detection, colorization, noise removal, photo restoration, and more. All models run on your hardware.",
   },
   {
     question: "Does SnapOtter collect any analytics?",

apps/landing/src/components/pricing.tsx

@@ -18,6 +18,7 @@ const freePlan = {
     "ARM and x86 support",
     "Air-gapped and offline ready",
     "Multi-user with team permissions",
+    "Available in 21 languages",
     "Audit logging",
     "Community support via GitHub and Discord",
     "All updates included",