refactor: Change object Point type to GenericPoint

Replaced instances of object literal Point types with the `GenericPoint` type.

packages/excalidraw/components/App.tsx

@@ -6913,13 +6913,14 @@ class App extends React.Component<AppProps, AppState> {
   private initialPointerDownState(
     event: React.PointerEvent<HTMLElement>,
   ): PointerDownState {
-    const [originX, originY] = viewportCoordsToSceneCoords(event, this.state);
+    const originCoords = viewportCoordsToSceneCoords(event, this.state);
+    const [originX, originY] = originCoords;
     const selectedElements = this.scene.getSelectedElements(this.state);
     const [minX, minY, maxX, maxY] = getCommonBounds(selectedElements);
     const isElbowArrowOnly = selectedElements.findIndex(isElbowArrow) === 0;
 
     return {
-      origin: pointFrom(originX, originY),
+      origin: originCoords,
       withCmdOrCtrl: event[KEYS.CTRL_OR_CMD],
       originInGrid: tupleToCoors(
         getGridPoint(
@@ -6936,7 +6937,7 @@ class App extends React.Component<AppProps, AppState> {
         event.clientY - this.state.offsetTop,
       ),
       // we need to duplicate because we'll be updating this state
-      lastCoords: pointFrom(originX, originY),
+      lastCoords: originCoords,
       originalElements: this.scene
         .getNonDeletedElements()
         .reduce((acc, element) => {
@@ -6957,14 +6958,14 @@ class App extends React.Component<AppProps, AppState> {
         hasBeenDuplicated: false,
         hasHitCommonBoundingBoxOfSelectedElements:
           this.isHittingCommonBoundingBoxOfSelectedElements(
-            pointFrom(originX, originY),
+            originCoords,
             selectedElements,
           ),
       },
       drag: {
         hasOccurred: false,
         offset: null,
-        origin: { ...origin },
+        origin: originCoords,
       },
       eventListeners: {
         onMove: null,

packages/excalidraw/types.ts

@@ -718,7 +718,7 @@ export type PointerDownState = Readonly<{
   // Scrollbar checks
   scrollbars: ReturnType<typeof isOverScrollBars>;
   // The previous pointer position
-  lastCoords: { x: number; y: number };
+  lastCoords: GenericPoint;
   // original element frozen snapshots so we can access the original
   // element attribute values at time of pointerdown
   originalElements: Map<string, NonDeleted<ExcalidrawElement>>;
@@ -753,10 +753,10 @@ export type PointerDownState = Readonly<{
     // Might change during the pointer interaction
     hasOccurred: boolean;
     // Might change during the pointer interaction
-    offset: { x: number; y: number } | null;
+    offset: GenericPoint | null;
     // by default same as PointerDownState.origin. On alt-duplication, reset
     // to current pointer position at time of duplication.
-    origin: { x: number; y: number };
+    origin: GenericPoint;
   };
   // We need to have these in the state so that we can unsubscribe them
   eventListeners: {