Added some basic shared components, utils, hooks

client/src/shared/hooks/onEscapeKeyDown.js

@@ -0,0 +1,21 @@
+import { useEffect } from 'react';
+
+import { KeyCodes } from 'shared/constants/keyCodes';
+
+const useOnEscapeKeyDown = (isListening, onEscapeKeyDown) => {
+  useEffect(() => {
+    const handleKeyDown = event => {
+      if (event.keyCode === KeyCodes.escape) {
+        onEscapeKeyDown();
+      }
+    };
+    if (isListening) {
+      document.addEventListener('keydown', handleKeyDown);
+    }
+    return () => {
+      document.removeEventListener('keydown', handleKeyDown);
+    };
+  }, [isListening, onEscapeKeyDown]);
+};
+
+export default useOnEscapeKeyDown;