feat(search): Add search index for tags

Introduces a search index for the Tag model to enable global search for
Tags. Includes fields for name, slug, and description with corresponding
weight values. Display attributes are limited to the description field.

Fixes #17073

netbox/extras/search.py

@@ -24,6 +24,17 @@ class JournalEntryIndex(SearchIndex):
     display_attrs = ('kind', 'created_by')
 
 
+@register_search
+class TagIndex(SearchIndex):
+    model = models.Tag
+    fields = (
+        ('name', 100),
+        ('slug', 110),
+        ('description', 500),
+    )
+    display_attrs = ('description',)
+
+
 @register_search
 class WebhookEntryIndex(SearchIndex):
     model = models.Webhook