fix: refactor fonts handling

app/[lang]/(live)/fonts.ts

@@ -1,4 +1,5 @@
 import { Fira_Mono, Fira_Sans } from "next/font/google"
+import localFont from "next/font/local"
 
 export const firaMono = Fira_Mono({
   subsets: ["latin"],
@@ -11,3 +12,14 @@ export const firaSans = Fira_Sans({
   weight: ["300", "400", "600", "900"],
   variable: "--ff-fira-sans",
 })
+
+export const biroScriptPlus = localFont({
+  src: [
+    {
+      path: "../../../public/_static/fonts/biro-script-plus/Biro-Script-Plus.ttf",
+      style: "normal",
+      weight: "500",
+    },
+  ],
+  variable: "--ff-biro-script-plus",
+})