refactor: separate elements logic into a standalone package (#9285)

packages/excalidraw/tests/fixtures/diagramFixture.ts

@@ -1,4 +1,4 @@
-import { VERSIONS } from "../../constants";
+import { VERSIONS } from "@excalidraw/common";
 
 import {
   diamondFixture,

packages/excalidraw/tests/fixtures/elementFixture.ts

@@ -1,8 +1,8 @@
+import { DEFAULT_FONT_FAMILY } from "@excalidraw/common";
+
 import type { Radians } from "@excalidraw/math";
 
-import { DEFAULT_FONT_FAMILY } from "../../constants";
-
-import type { ExcalidrawElement } from "../../element/types";
+import type { ExcalidrawElement } from "@excalidraw/element/types";
 
 const elementBase: Omit<ExcalidrawElement, "type"> = {
   id: "vWrqOAfkind2qcm7LDAGZ",