feat(dependencies): add @iconify-json/simple-icons and update auth routes

- Added @iconify-json/simple-icons version 1.2.57 to pnpm-lock.yaml and package.json.
- Changed the sign-up endpoint from '/sign-in/email' to '/sign-up/email' in AuthController.
- Enhanced SocialAuthButtons component with improved styling and accessibility features.
- Updated login page layout and error message presentation for better user experience.

Signed-off-by: Innei <tukon479@gmail.com>

be/apps/dashboard/package.json

@@ -59,6 +59,7 @@
   "devDependencies": {
     "@egoist/tailwindcss-icons": "1.9.0",
     "@iconify-json/mingcute": "1.2.5",
+    "@iconify-json/simple-icons": "1.2.57",
     "@tailwindcss/container-queries": "0.1.1",
     "@tailwindcss/postcss": "4.1.16",
     "@tailwindcss/typography": "0.5.19",