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

resources/views/livewire/reactions.blade.php

@@ -0,0 +1,38 @@
+<div class="mt-1 flex flex-wrap items-center gap-1">
+    {{-- Existing reactions with counts --}}
+    @foreach ($this->reactionSummary as $summary)
+        <button
+            wire:click="toggleReaction('{{ $summary['reaction'] }}')"
+            type="button"
+            title="{{ implode(', ', $summary['names']) }}{{ $summary['total_reactors'] > 3 ? ' and ' . ($summary['total_reactors'] - 3) . ' more' : '' }}"
+            class="inline-flex items-center gap-1 rounded-full border px-2 py-0.5 text-xs transition
+                {{ $summary['reacted_by_user']
+                    ? 'border-primary-300 bg-primary-50 text-primary-700 dark:border-primary-600 dark:bg-primary-900/30 dark:text-primary-300'
+                    : 'border-gray-200 bg-gray-50 text-gray-600 hover:bg-gray-100 dark:border-gray-600 dark:bg-gray-800 dark:text-gray-400 dark:hover:bg-gray-700' }}">
+            <span>{{ $summary['emoji'] }}</span>
+            <span>{{ $summary['count'] }}</span>
+        </button>
+    @endforeach
+
+    {{-- Add reaction button --}}
+    @auth
+        <div class="relative" x-data="{ open: $wire.entangle('showPicker') }">
+            <button @click="open = !open" type="button"
+                class="inline-flex items-center rounded-full border border-dashed border-gray-300 px-2 py-0.5 text-xs text-gray-400 hover:border-gray-400 hover:text-gray-500 dark:border-gray-600 dark:text-gray-500 dark:hover:border-gray-500 dark:hover:text-gray-400">
+                +
+            </button>
+
+            {{-- Emoji picker dropdown --}}
+            <div x-show="open" x-cloak @click.outside="open = false"
+                class="absolute bottom-full left-0 z-50 mb-1 flex gap-1 rounded-lg border border-gray-200 bg-white p-2 shadow-lg dark:border-gray-600 dark:bg-gray-800">
+                @foreach (\Relaticle\Comments\Config::getReactionEmojiSet() as $key => $emoji)
+                    <button wire:click="toggleReaction('{{ $key }}')" type="button"
+                        class="rounded p-1 text-base hover:bg-gray-100 dark:hover:bg-gray-700"
+                        title="{{ str_replace('_', ' ', $key) }}">
+                        {{ $emoji }}
+                    </button>
+                @endforeach
+            </div>
+        </div>
+    @endauth
+</div>