feat(app): various updates for v2.0.0

src/lib/icons.ts

@@ -1,4 +1,4 @@
-import * as Icons from "phosphor-react";
+import * as Icons from "@phosphor-icons/react";
 import { icons as iconData } from "@phosphor-icons/core";
 
 import { IconEntry } from ".";
@@ -12,6 +12,4 @@ if (process.env.NODE_ENV === "development") {
   console.log(`${icons.length} icons`);
 }
 
-export const iconCount = (icons.length * 6)
-  .toString()
-  .replace(/\B(?=(\d{3})+(?!\d))/g, ",");
+export const iconCount = Intl.NumberFormat("en-US").format(icons.length * 6);