feat: implement basic oauth authentication

src/components/user/signin-button.tsx

@@ -0,0 +1,14 @@
+import { signIn } from '@/auth';
+
+export default function SignIn() {
+  return (
+    <form
+      action={async () => {
+        'use server';
+        await signIn('authentik');
+      }}
+    >
+      <button type='submit'>Signin with Authentik</button>
+    </form>
+  );
+}

src/components/user/signout-button.tsx

@@ -0,0 +1,14 @@
+import { signOut } from '@/auth';
+
+export function SignOut() {
+  return (
+    <form
+      action={async () => {
+        'use server';
+        await signOut();
+      }}
+    >
+      <button type='submit'>Sign Out</button>
+    </form>
+  );
+}