test(bruno): Add API tests for Kobo, Koreader, OPDS, collections

- Add Kobo bookmark/markup sync tests
- Add Koreader progress/bookmark sync tests
- Add OPDS feed tests
- Add collection tests
- Add sync tests for book linking

bruno/collections/Update Collection.bru

@@ -0,0 +1,37 @@
+meta {
+  name: Update Collection
+  type: http
+  seq: 4
+}
+
+put {
+  url: {{base_url}}/api/collections/{{collection_id}}
+  body: json
+  auth: bearer
+}
+
+auth:bearer {
+  token: {{token}}
+}
+
+body:json {
+  {
+    "name": "Sci-Fi Favorites",
+    "description": "Updated description",
+    "color": "#00ff00",
+    "icon": "⭐",
+    "auto_assign_rules": [
+      {
+        "id": "rule-2",
+        "field": "series",
+        "operator": "equals",
+        "value": "Foundation",
+        "priority": 9
+      }
+    ],
+    "view_settings": {
+      "sort_by": "author",
+      "view_mode": "list"
+    }
+  }
+}