REFACTOR(repo): simplify project structure

- Move services/nextjs/ to nextjs/
- Move Dockerfile.prod to Dockerfile at root
- Remove deploy/ folder (K8s manifests moved to K3S-HOME/web-apps)
- Remove .gitea/ workflows
- Update GitHub Actions for new structure
- Remove develop branch triggers

nextjs/app/page.tsx

@@ -0,0 +1,11 @@
+import { TodoApp } from '@/src/widgets/todo-app'
+import PasswordModal from '@/src/features/password-auth/ui/PasswordModal'
+
+export default function Home() {
+  return (
+    <PasswordModal>
+      <TodoApp />
+    </PasswordModal>
+  )
+}
+