🔒 Add Nostr authentication support with custom guard and user provider

🛠️ Integrate Nostr auth across relevant components and views
📦 Update config, routes, and service provider for Nostr auth

app/Auth/NostrSessionGuard.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Auth;
+
+use Illuminate\Auth\SessionGuard;
+use Illuminate\Contracts\Auth\Authenticatable;
+
+class NostrSessionGuard extends SessionGuard
+{
+    public function loginByPubkey(string $pubkey): void
+    {
+        $user = new NostrUser($pubkey);
+
+        $this->updateSession($user->getAuthIdentifier());
+
+        $this->setUser($user);
+
+        $this->fireLoginEvent($user, false);
+    }
+
+    protected function updateSession($id): void
+    {
+        $this->session->put($this->getName(), $id);
+        $this->session->migrate(true);
+    }
+
+    public function user(): ?Authenticatable
+    {
+        if ($this->user !== null) {
+            return $this->user;
+        }
+
+        $id = $this->session->get($this->getName());
+
+        if ($id !== null) {
+            $this->user = $this->provider->retrieveById($id);
+        }
+
+        return $this->user;
+    }
+}