feat(spotlight): add support for custom search-engines (#1200)

* feat(spotlight): add search settings link

* feat(search-engine): add to manage pages

* feat(spotlight): add children option for external search engines

* chore: revert search settings

* fix: deepsource issue

* fix: inconsistent breadcrum placement

* chore: address pull request feedback

packages/db/migrations/mysql/0008_far_lifeguard.sql

@@ -0,0 +1,9 @@
+CREATE TABLE `search_engine` (
+	`id` varchar(64) NOT NULL,
+	`icon_url` text NOT NULL,
+	`name` varchar(64) NOT NULL,
+	`short` varchar(8) NOT NULL,
+	`description` text,
+	`url_template` text NOT NULL,
+	CONSTRAINT `search_engine_id` PRIMARY KEY(`id`)
+);

packages/db/migrations/mysql/meta/_journal.json

@@ -57,6 +57,13 @@
       "when": 1723749320706,
       "tag": "0007_boring_nocturne",
       "breakpoints": true
+    },
+    {
+      "idx": 8,
+      "version": "5",
+      "when": 1727532165317,
+      "tag": "0008_far_lifeguard",
+      "breakpoints": true
     }
   ]
 }