LibWeb: Add IDBCursor

Author: https://github.com/stelar7
Commit: 71772d97dc
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2236
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/IndexedDB/IDBCursor.idl

@@ -0,0 +1,22 @@
+#import <IndexedDB/IDBRequest.idl>
+
+[Exposed=(Window,Worker)]
+interface IDBCursor {
+    [FIXME] readonly attribute (IDBObjectStore or IDBIndex) source;
+    [FIXME] readonly attribute IDBCursorDirection direction;
+    [FIXME] readonly attribute any key;
+    [FIXME] readonly attribute any primaryKey;
+    [FIXME, SameObject] readonly attribute IDBRequest request;
+    [FIXME] undefined advance([EnforceRange] unsigned long count);
+    [FIXME] undefined continue(optional any key);
+    [FIXME] undefined continuePrimaryKey(any key, any primaryKey);
+    [FIXME, NewObject] IDBRequest update(any value);
+    [FIXME, NewObject] IDBRequest delete();
+};
+
+enum IDBCursorDirection {
+    "next",
+    "nextunique",
+    "prev",
+    "prevunique"
+};