refactor: update better-auth configuration and clean up code

- Changed the version of "better-auth" to use a catalog reference in package.json and bun.lock for better dependency management.
- Removed unnecessary comments and cleaned up the code in various files to enhance readability and maintainability.
- Updated the authentication handling in hooks.server.ts to ensure proper token retrieval.
- Simplified the layout and structure of Svelte components for improved clarity and performance.

apps/web/src/hooks.server.ts

@@ -1,6 +1,6 @@
 import type { Handle } from "@sveltejs/kit";
-import { getToken } from "@mmailaender/convex-better-auth-svelte/sveltekit";
 import { createAuth } from "@sgse-app/backend/convex/auth";
+import { getToken } from "@mmailaender/convex-better-auth-svelte/sveltekit";
 
 export const handle: Handle = async ({ event, resolve }) => {
   event.locals.token = await getToken(createAuth, event.cookies);