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/Feature/PollingConfigTest.php

@@ -0,0 +1,33 @@
+<?php
+
+use Relaticle\Comments\Config;
+
+it('returns false for isBroadcastingEnabled by default', function () {
+    expect(Config::isBroadcastingEnabled())->toBeFalse();
+});
+
+it('returns true for isBroadcastingEnabled when config overridden', function () {
+    config()->set('comments.broadcasting.enabled', true);
+
+    expect(Config::isBroadcastingEnabled())->toBeTrue();
+});
+
+it('returns comments as default broadcast channel prefix', function () {
+    expect(Config::getBroadcastChannelPrefix())->toBe('comments');
+});
+
+it('returns custom broadcast channel prefix when overridden', function () {
+    config()->set('comments.broadcasting.channel_prefix', 'my-app-comments');
+
+    expect(Config::getBroadcastChannelPrefix())->toBe('my-app-comments');
+});
+
+it('returns 10s as default polling interval', function () {
+    expect(Config::getPollingInterval())->toBe('10s');
+});
+
+it('returns custom polling interval when overridden', function () {
+    config()->set('comments.polling.interval', '30s');
+
+    expect(Config::getPollingInterval())->toBe('30s');
+});