feat: add GitHub integration with icons and configuration

Author: mathix420

content/github.json

@@ -0,0 +1,16 @@
+{
+  "id": "github",
+  "name": "GitHub",
+  "description": "Code hosting and collaboration platform for developers",
+  "url": "https://github.com",
+  "logo": "https://ftwa.mathix.dev/icons/github/regular.png",
+  "macLogo": "https://ftwa.mathix.dev/icons/github/mac.png",
+  "screenshot": "/screenshot/github.png",
+  "tags": [
+    "programming",
+    "git",
+    "tool",
+    "productivity"
+  ],
+  "logoSize": 512
+}