feat: Add basic shortcuts (#1436)

client/src/contexts/BoardShortcutsContext.js

@@ -0,0 +1,8 @@
+/*!
+ * Copyright (c) 2024 PLANKA Software GmbH
+ * Licensed under the Fair Use License: https://github.com/plankanban/planka/blob/master/LICENSE.md
+ */
+
+import { createContext } from 'react';
+
+export default createContext([null, null]);

client/src/contexts/index.js

@@ -4,5 +4,6 @@
  */
 
 import ClosableContext from './ClosableContext';
+import BoardShortcutsContext from './BoardShortcutsContext';
 
-export { ClosableContext }; // eslint-disable-line import/prefer-default-export
+export { ClosableContext, BoardShortcutsContext };