feat: Add option to flip single element on the context menu (#2520)

Co-authored-by: dwelle <luzar.david@gmail.com>

src/actions/index.ts

@@ -66,6 +66,8 @@ export {
   distributeVertically,
 } from "./actionDistribute";
 
+export { actionFlipHorizontal, actionFlipVertical } from "./actionFlip";
+
 export {
   actionCopy,
   actionCut,