init: lab project bootstrapped from isletmem-kovakcrm

- CRM domain modules removed (customers, services, software, calendar, tasks, invoices, leads, finance, etc.)
- DLS branding: package name=lab, logo wordmark, sidebar nav, header CTA
- Tenant layer extended with kind dimension (lab|clinic) + requireTenantKind helper
- Schema rewritten for DLS domain: jobs, job_files, job_status_history, prosthetics, connections, finance_entries, notifications
- Onboarding form: clinic/lab account-type selection + auto-generated memberNumber
- Placeholder routes for jobs/{inbound,outbound,new}, products, finance, connections
- PDF spec + spec.md under belgeler/
- db: lab database + 13 collections + indexes + storage bucket (job-files) provisioned via Appwrite MCP

Ref: belgeler/dls-ui-tasarim.pdf

src/app/(auth)/sign-in-3/page.tsx

@@ -0,0 +1,11 @@
+import { LoginForm3 } from "./components/login-form-3"
+
+export default function LoginPage() {
+  return (
+    <div className="bg-muted flex min-h-svh flex-col items-center justify-center p-6 md:p-10">
+      <div className="w-full max-w-sm md:max-w-4xl">
+        <LoginForm3 />
+      </div>
+    </div>
+  )
+}