revert: "build: Migrate to Vite 🚀" (#6814)

Revert "build: Migrate to Vite 🚀 (#6713)"

This reverts commit e93bbc5776.

src/element/newElement.ts

@@ -443,7 +443,7 @@ const _deepCopyElement = (val: any, depth: number = 0) => {
   // we're not cloning non-array & non-plain-object objects because we
   // don't support them on excalidraw elements yet. If we do, we need to make
   // sure we start cloning them, so let's warn about it.
-  if (import.meta.env.DEV) {
+  if (process.env.NODE_ENV === "development") {
     if (
       objectType !== "[object Object]" &&
       objectType !== "[object Array]" &&