Implement SearchPlain view

Replace TODO stub with plain text output grouped by result type
(comments, documents, news posts, packets, servers, users).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: carlbennett

src/Views/Search/SearchPlain.php

@@ -2,6 +2,13 @@
 
 namespace BNETDocs\Views\Search;
 
+use \BNETDocs\Libraries\Comment;
+use \BNETDocs\Libraries\Document;
+use \BNETDocs\Libraries\News\Post as NewsPost;
+use \BNETDocs\Libraries\Packet\Packet;
+use \BNETDocs\Libraries\Server\Server;
+use \BNETDocs\Libraries\User\User;
+
 class SearchPlain extends \BNETDocs\Views\Base\Plain
 {
     public static function invoke(\BNETDocs\Interfaces\Model $model): void
@@ -11,7 +18,63 @@ public static function invoke(\BNETDocs\Interfaces\Model $model): void
             throw new \BNETDocs\Exceptions\InvalidModelException($model);
         }
 
-        echo 'TODO';
         $model->_responseHeaders['Content-Type'] = self::mimeType();
+
+        $q = $model->user_input ?? '';
+        $results = $model->results;
+
+        if (!$results || $results->isEmpty())
+        {
+            printf("No results for: %s\n", $q);
+            return;
+        }
+
+        printf("Search Results\n==============\nQuery: %s\n\n", $q);
+
+        $sections = [
+            'Comments'   => $results->getComments(),
+            'Documents'  => $results->getDocuments(),
+            'News Posts' => $results->getNewsPosts(),
+            'Packets'    => $results->getPackets(),
+            'Servers'    => $results->getServers(),
+            'Users'      => $results->getUsers(),
+        ];
+
+        foreach ($sections as $label => $items)
+        {
+            if (empty($items)) continue;
+
+            $heading = sprintf('%s (%d)', $label, count($items));
+            printf("%s\n%s\n", $heading, str_repeat('-', strlen($heading)));
+
+            foreach ($items as $item)
+            {
+                switch (true)
+                {
+                    case $item instanceof Comment:
+                        printf("- Comment #%d\n", $item->getId());
+                        break;
+                    case $item instanceof Document:
+                        printf("- %s <%s>\n", $item->getTitle(), $item->getURI());
+                        break;
+                    case $item instanceof NewsPost:
+                        printf("- %s <%s>\n", $item->getTitle(), $item->getURI());
+                        break;
+                    case $item instanceof Packet:
+                        printf("- %s <%s>\n", $item->getLabel(), $item->getURI());
+                        break;
+                    case $item instanceof Server:
+                        printf("- %s <%s>\n", $item->getLabel(), $item->getURI());
+                        break;
+                    case $item instanceof User:
+                        printf("- %s <%s>\n", $item->getName(), $item->getURI());
+                        break;
+                    default:
+                        printf("- ID %d\n", $item->getId());
+                }
+            }
+
+            echo "\n";
+        }
     }
 }