🔒 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/NostrUser.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace App\Auth;
+
+use Illuminate\Contracts\Auth\Authenticatable;
+
+class NostrUser implements Authenticatable
+{
+    protected string $pubkey;
+    protected ?object $pleb;
+
+    public function __construct(string $pubkey)
+    {
+        $this->pubkey = $pubkey;
+        $this->pleb = \App\Models\EinundzwanzigPleb::query()
+            ->where('pubkey', $pubkey)
+            ->first();
+    }
+
+    public function getAuthIdentifierName(): string
+    {
+        return 'pubkey';
+    }
+
+    public function getAuthIdentifier(): string
+    {
+        return $this->pubkey;
+    }
+
+    public function getAuthPassword(): string
+    {
+        return '';
+    }
+
+    public function getRememberToken(): ?string
+    {
+        return null;
+    }
+
+    public function setRememberToken($value): void
+    {
+        //
+    }
+
+    public function getRememberTokenName(): ?string
+    {
+        return null;
+    }
+
+    public function getAuthPasswordName(): string
+    {
+        return 'password';
+    }
+
+    public function getPubkey(): string
+    {
+        return $this->pubkey;
+    }
+
+    public function getPleb(): ?object
+    {
+        return $this->pleb;
+    }
+}