[WEB-5675] chore: implement fontsource as the fonts library (#8398)

apps/admin/app/root.tsx

@@ -10,6 +10,11 @@ import { LogoSpinner } from "@/components/common/logo-spinner";
 import globalStyles from "@/styles/globals.css?url";
 import type { Route } from "./+types/root";
 import { AppProviders } from "./providers";
+// fonts
+import "@fontsource-variable/inter";
+import interVariableWoff2 from "@fontsource-variable/inter/files/inter-latin-wght-normal.woff2?url";
+import "@fontsource/material-symbols-rounded";
+import "@fontsource/ibm-plex-mono";
 
 const APP_TITLE = "Plane | Simple, extensible, open-source project management tool.";
 const APP_DESCRIPTION =
@@ -22,6 +27,13 @@ export const links: LinksFunction = () => [
   { rel: "shortcut icon", href: faviconIco },
   { rel: "manifest", href: `/site.webmanifest.json` },
   { rel: "stylesheet", href: globalStyles },
+  {
+    rel: "preload",
+    href: interVariableWoff2,
+    as: "font",
+    type: "font/woff2",
+    crossOrigin: "anonymous",
+  },
 ];
 
 export function Layout({ children }: { children: ReactNode }) {