Convert store selectors to Typescript

frontend/src/Store/Selectors/createCommandSelector.ts

@@ -0,0 +1,11 @@
+import { createSelector } from 'reselect';
+import { findCommand } from 'Utilities/Command';
+import createCommandsSelector from './createCommandsSelector';
+
+function createCommandSelector(name: string, contraints = {}) {
+  return createSelector(createCommandsSelector(), (commands) => {
+    return findCommand(commands, { name, ...contraints });
+  });
+}
+
+export default createCommandSelector;