preparation for v2 launch

src/utils/V2Modal.tsx

@@ -0,0 +1,35 @@
+import { Button, Typography } from "@mui/material";
+import React, { useState } from "react";
+import { Modal } from "../ui/React/Modal";
+
+let v2ModalOpen = false;
+
+export const openV2Modal = (): void => {
+  v2ModalOpen = true;
+};
+
+export const V2Modal = (): React.ReactElement => {
+  const [open, setOpen] = useState(v2ModalOpen);
+  return (
+    <Modal open={open} onClose={() => undefined}>
+      <Typography>Welcome to bitburner v2.0.0!</Typography>{" "}
+      <Typography>While this version does not change the game a lot, it does have quite a few API breaks.</Typography>{" "}
+      <Typography>
+        A file was added to your home computer called V2_0_0_API_BREAK.txt and it is highly recommended you take a look
+        at this file. It explains where most of the API break have occured.
+      </Typography>{" "}
+      <Typography>
+        You should also take a look at{" "}
+        <a target="_" href="https://github.com/danielyxie/bitburner/blob/dev/doc/source/v2.0.0_migration.rst">
+          {" "}
+          the migration guide
+        </a>{" "}
+        as well as{" "}
+        <a target="_" href="https://github.com/danielyxie/bitburner/blob/dev/doc/source/changelog.rst">
+          the changelog
+        </a>
+      </Typography>
+      <Button onClick={() => setOpen(false)}>I understand</Button>
+    </Modal>
+  );
+};