Add Schema.org JSON-LD structured data

schema.json

@@ -0,0 +1,18 @@
+{
+  "@context": "https://schema.org",
+  "@type": "SoftwareApplication",
+  "name": "Universal Computer",
+  "description": "Turing machine simulator with binary counter, busy beaver, and palindrome detection implementations",
+  "applicationCategory": "EducationalApplication",
+  "operatingSystem": "Cross-platform",
+  "author": {
+    "@type": "Organization",
+    "name": "BlackRoad",
+    "url": "https://blackroad.io"
+  },
+  "offers": {
+    "@type": "Offer",
+    "price": "0",
+    "priceCurrency": "USD"
+  }
+}