chore: clean up git tracking, add gitignore and correct favicon formats

Former-commit-id: 6fe2ecd0cba9e05194df24b6e587896593ae4832

app/[locale]/layout.tsx

@@ -41,13 +41,6 @@ export async function generateMetadata(props: {
         en: `${baseUrl}/en`,
       },
     },
-    icons: {
-      icon: [
-        { url: '/favicon.ico', sizes: 'any' },
-        { url: '/assets/logo.png', type: 'image/png' },
-      ],
-      apple: [{ url: '/assets/logo.png', sizes: '180x180', type: 'image/png' }],
-    },
   };
 }