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

src/Filament/Infolists/Components/CommentsEntry.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Relaticle\Comments\Filament\Infolists\Components;
+
+use Filament\Infolists\Components\Entry;
+
+class CommentsEntry extends Entry
+{
+    protected string $view = 'comments::filament.infolists.components.comments-entry';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->columnSpanFull();
+    }
+}