feat: export `changeProperty()` and `getFormValue()`. (#6957)

src/actions/actionProperties.tsx

@@ -95,7 +95,7 @@ import { register } from "./register";
 
 const FONT_SIZE_RELATIVE_INCREASE_STEP = 0.1;
 
-const changeProperty = (
+export const changeProperty = (
   elements: readonly ExcalidrawElement[],
   appState: AppState,
   callback: (element: ExcalidrawElement) => ExcalidrawElement,
@@ -118,7 +118,7 @@ const changeProperty = (
   });
 };
 
-const getFormValue = function <T>(
+export const getFormValue = function <T>(
   elements: readonly ExcalidrawElement[],
   appState: AppState,
   getAttribute: (element: ExcalidrawElement) => T,