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/Concerns/HasComments.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Relaticle\Comments\Concerns;
+
+use Illuminate\Database\Eloquent\Relations\MorphMany;
+use Relaticle\Comments\Config;
+
+trait HasComments
+{
+    public function comments(): MorphMany
+    {
+        return $this->morphMany(Config::getCommentModel(), 'commentable');
+    }
+
+    public function topLevelComments(): MorphMany
+    {
+        return $this->comments()->whereNull('parent_id');
+    }
+
+    public function commentCount(): int
+    {
+        return $this->comments()->count();
+    }
+}

src/Concerns/IsCommenter.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Relaticle\Comments\Concerns;
+
+use Filament\Models\Contracts\HasAvatar;
+use Filament\Models\Contracts\HasName;
+
+trait IsCommenter
+{
+    public function getCommentName(): string
+    {
+        if ($this instanceof HasName) {
+            return $this->getFilamentName();
+        }
+
+        return $this->name ?? 'Unknown';
+    }
+
+    public function getCommentAvatarUrl(): ?string
+    {
+        if ($this instanceof HasAvatar) {
+            return $this->getFilamentAvatarUrl();
+        }
+
+        return null;
+    }
+}