feat: replace Inter font with Bai Jamjuree in layout and add font utility

apps/landing/src/lib/fonts.ts

@@ -0,0 +1,7 @@
+import { Bai_Jamjuree } from 'next/font/google';
+
+export const baiJamjureeFont = Bai_Jamjuree({
+  subsets: ['latin'],
+  weight: ['300', '400', '500', '600', '700'],
+  display: 'swap',
+});