Remove obsolete scripts and configuration files for self-hosting and database migrations

- Deleted `pnpm-workspace.yaml` as it is no longer needed.
- Removed `apply-migrations.sh` script that handled database migrations.
- Eliminated `generate-full-stack-env.mjs` script for environment variable generation.
- Deleted `selfhost-backup.sh` script for creating backups of the self-hosted environment.
- Removed `selfhost-doctor.sh` script for health checks of the self-hosted services.
- Deleted `selfhost-restore.sh` script for restoring backups in the self-hosted environment.

app/login/page.tsx

@@ -1,10 +1,9 @@
 import { login } from "@/app/login/actions";
 import { AuthPageShell } from "@/components/auth/auth-page-shell";
 import { ErrorToaster } from "@/components/error-toaster";
-import { getFirstAdminSetupState } from "@/lib/auth/first-admin-setup";
 import { LockKeyhole, LogIn, Mail } from "lucide-react";
 import Link from "next/link";
-import { Button, Input, Label } from "poyraz-ui/atoms";
+import { Input, Label } from "poyraz-ui/atoms";
 import { SubmitButton } from "@/components/auth/submit-button";
 
 export default async function LoginPage({
@@ -12,10 +11,7 @@ export default async function LoginPage({
 }: {
   searchParams: Promise<{ [key: string]: string | string[] | undefined }>;
 }) {
-  const [resolvedParams, setupState] = await Promise.all([
-    searchParams,
-    getFirstAdminSetupState(),
-  ]);
+  const resolvedParams = await searchParams;
   const error = resolvedParams?.error;
   const message = resolvedParams?.message;
 
@@ -74,19 +70,15 @@ export default async function LoginPage({
         }
         secondaryAction={null}
         footer={
-          setupState.available ? (
-            <div className="text-center text-sm">
-              İlk kurulumu yapmadın mı?{" "}
-              <Link
-                href="/register"
-                className="font-medium text-primary transition-colors hover:text-primary-hover"
-              >
-                Admin hesabını oluştur
-              </Link>
-            </div>
-          ) : (
-            <span></span>
-          )
+          <div className="text-center text-sm">
+            İlk kurulumu yapmadın mı?{" "}
+            <Link
+              href="/register"
+              className="font-medium text-primary transition-colors hover:text-primary-hover"
+            >
+              Admin hesabını oluştur
+            </Link>
+          </div>
         }
       />
     </>