refactor(icons): consolidate categories with metadata mapping and category validation

metadata.map.json

@@ -0,0 +1,65 @@
+{
+  "example-icon": {
+    "base": "svg",
+    "aliases": [
+      "example-alias",
+      "another-alias"
+    ],
+    "categories": [
+      "AI",
+      "Analytics-&-Monitoring",
+      "Automation",
+      "Browsers-&-Search",
+      "Cloud-&-Hosting",
+      "Communication",
+      "Community-&-Social",
+      "Content-Management",
+      "Crypto",
+      "Databases",
+      "Design",
+      "Development",
+      "Downloaders",
+      "E-Commerce",
+      "Education",
+      "File-Management-&-Sync",
+      "Finance",
+      "Food",
+      "Framework",
+      "Gaming",
+      "Hardware",
+      "Health",
+      "Home-Automation",
+      "Identity",
+      "Infrastructure",
+      "Library",
+      "Mapping-&-Location",
+      "Media",
+      "Music-&-Audio",
+      "Nature",
+      "Networking",
+      "News",
+      "Notes-&-Productivity",
+      "Operating-Systems",
+      "Organization-&-Planning",
+      "Programming-Language",
+      "Security",
+      "Software",
+      "Streaming",
+      "Travel",
+      "Version-Control",
+      "Video",
+      "Virtualization"
+    ],
+    "update": {
+      "timestamp": "YYYY-MM-DDTHH:mm:ssZ",
+      "author": {
+        "id": 12345678,
+        "login": "contributor-login"
+      }
+    },
+    "colors": {
+      "dark": "example-icon-dark",
+      "light": "example-icon-light"
+    }
+  }
+}