fix monorepo package.json & tailwind

Fixes to package naming, sveltekit version mixups, local import
extensions, tailwind app.css imports, tailwind references.

src/app.css

@@ -1,2 +1 @@
-@import 'tailwindcss';
-@plugin '@tailwindcss/forms';
+@import '@repo/tailwindcss-config/app.css';