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/Add Books to Collection.bru

@@ -0,0 +1,25 @@
+meta {
+  name: Add Books to Collection
+  type: http
+  seq: 6
+}
+
+post {
+  url: {{base_url}}/api/collections/{{collection_id}}/books
+  body: json
+  auth: bearer
+}
+
+auth:bearer {
+  token: {{token}}
+}
+
+body:json {
+  {
+    "book_ids": [
+      "{{book_id_1}}",
+      "{{book_id_2}}",
+      "{{book_id_3}}"
+    ]
+  }
+}