refactor: rename for Laravel conventions and better DX

- Rename IsCommenter trait to CanComment, Commenter interface to Commentator
- Move models to Models/ namespace (Comment, Reaction, Attachment, Subscription)
- Rename user_type/user_id polymorphic columns to commenter_type/commenter_id
- Rename Config class to CommentsConfig, update config key tables->table_names
- Rename getCommentName() to getCommentDisplayName() on commentator models
- Add column_names config section for commenter morph customization
- Add table_names config with all 5 tables individually configurable
- Expand translation file with structured i18n groups
- Update all Blade views, Livewire components, events, listeners, and tests

database/migrations/create_comments_table.php.stub

@@ -8,13 +8,13 @@ return new class extends Migration
 {
     public function up(): void
     {
-        Schema::create(config('comments.tables.comments', 'comments'), function (Blueprint $table) {
+        Schema::create(config('comments.table_names.comments', 'comments'), function (Blueprint $table) {
             $table->id();
             $table->morphs('commentable');
-            $table->morphs('user');
+            $table->morphs('commenter');
             $table->foreignId('parent_id')
                 ->nullable()
-                ->constrained(config('comments.tables.comments', 'comments'))
+                ->constrained(config('comments.table_names.comments', 'comments'))
                 ->cascadeOnDelete();
             $table->text('body');
             $table->timestamp('edited_at')->nullable();