feat: initial release of relaticle/comments

Filament comments package with:
- Polymorphic commenting on any Eloquent model
- Threaded replies with configurable depth
- @mentions with autocomplete and user search
- Emoji reactions with toggle and who-reacted tooltips
- File attachments via Livewire uploads
- Reply and mention notifications via Filament notification system
- Thread subscriptions for notification control
- Real-time broadcasting (opt-in Echo) with polling fallback
- Dark mode support
- CommentsAction, CommentsTableAction, CommentsEntry for Filament integration
- 204 tests, 421 assertions

tests/Models/User.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Relaticle\Comments\Tests\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Foundation\Auth\User as Authenticatable;
+use Illuminate\Notifications\Notifiable;
+use Relaticle\Comments\Concerns\IsCommenter;
+use Relaticle\Comments\Contracts\Commenter;
+use Relaticle\Comments\Tests\Database\Factories\UserFactory;
+
+class User extends Authenticatable implements Commenter
+{
+    use HasFactory;
+    use IsCommenter;
+    use Notifiable;
+
+    protected $table = 'users';
+
+    protected $fillable = ['name', 'email', 'password'];
+
+    protected static function newFactory(): UserFactory
+    {
+        return UserFactory::new();
+    }
+}