chore: move next admin packages to core repo (#5983)

**What**
- Move packages for `next` version of admin to core repo

**Other**
- Since this PR introduces packages that depend on Vite 5, it also introduces @types/node@^20. We have never had a direct dependency on the types package for Node, and as far as I can see that has resulted in us using the types from Node.js@8, as those are a dependency of one of our dependencies. With the introduction of @types/node@^20, two of our packages had TS errors because they were using the NodeJS.Timer type, which was deprecated in Node.js@14. We should add specific @types/node packages to all our packages, but I haven't done so in this PR to keep it as clean as possible.
- Q: @olivermrbl I've added the new packages to the ignore list for changeset, is this enough to prevent them from being published?

packages/admin-next/dashboard/src/components/common/thumbnail/index.ts

@@ -0,0 +1 @@
+export * from "./thumbnail";

packages/admin-next/dashboard/src/components/common/thumbnail/thumbnail.tsx

@@ -0,0 +1,22 @@
+import { Photo } from "@medusajs/icons";
+
+type ThumbnailProps = {
+  src?: string | null;
+  alt?: string;
+};
+
+export const Thumbnail = ({ src, alt }: ThumbnailProps) => {
+  return (
+    <div className="bg-ui-bg-component flex h-8 w-6 items-center justify-center overflow-hidden rounded-[4px]">
+      {src ? (
+        <img
+          src={src}
+          alt={alt}
+          className="h-full w-full object-cover object-center"
+        />
+      ) : (
+        <Photo />
+      )}
+    </div>
+  );
+};