Add lighting ISP preview

unfurler/src/routes.ts

@@ -46,6 +46,17 @@ const routes = {
           return `Lightning Channel: ${path[0]}`;
         }
       },
+      nodes: {
+        routes: {
+          isp: {
+            render: true,
+            params: 1,
+            getTitle(path) {
+              return `Lightning ISP: ${path[0]}`;
+            }
+          }
+        }
+      }
     }
   },
   mining: {