feat: cursor alignment when creating linear elements with shift pressed (#5518)

* feat: cursor alignment when creating linear elements

* feat: apply cursor alignment to multi-point linear elements

* refactor: rename size helper function

src/element/index.ts

@@ -53,6 +53,7 @@ export { textWysiwyg } from "./textWysiwyg";
 export { redrawTextBoundingBox } from "./textElement";
 export {
   getPerfectElementSize,
+  getLockedLinearCursorAlignSize,
   isInvisiblySmallElement,
   resizePerfectLineForNWHandler,
   getNormalizedDimensions,