Add next-auth-options.ts to Foundation code owners (calcom#24295)

Added packages/features/auth/lib/next-auth-options.ts to CODEOWNERS for the Foundation team to ensure proper review and oversight of authentication configuration changes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: sean-brydon

.github/CODEOWNERS

@@ -23,6 +23,7 @@
 /packages/app-store/office365calendar/**/* @calcom/Foundation
 /packages/app-store/zohocalendar/**/* @calcom/Foundation
 /packages/embeds/**/* @calcom/Foundation
+/packages/features/auth/lib/next-auth-options.ts @calcom/Foundation
 /packages/features/bookings/lib/**/* @calcom/Foundation
 /packages/lib/getAggregatedAvailability.ts @calcom/Foundation
 /packages/lib/getUserAvailability.ts @calcom/Foundation