[portal][ui] add companies filter

apps/portal/src/pages/index.tsx

@@ -1,11 +1,23 @@
+import { useState } from 'react';
+import type { TypeaheadOption } from '@tih/ui';
+
+import CompaniesTypeahead from '~/components/global/CompaniesTypeahead';
+
 export default function HomePage() {
+  const [selectedCompany, setSelectedCompany] =
+    useState<TypeaheadOption | null>(null);
+
   return (
     <main className="flex-1 overflow-y-auto">
       <div className="flex h-full items-center justify-center">
-        <div>
+        <div className="space-y-4">
           <h1 className="text-primary-600 text-center text-4xl font-bold">
             Homepage
           </h1>
+          <CompaniesTypeahead
+            onSelect={(option) => setSelectedCompany(option)}
+          />
+          <pre>{JSON.stringify(selectedCompany, null, 2)}</pre>
         </div>
       </div>
     </main>