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/create-medusa-app/src/utils/facts.ts

@@ -1,11 +1,11 @@
 import boxen from "boxen"
 import chalk from "chalk"
-import { Ora } from "ora"
 import { emojify } from "node-emoji"
+import { Ora } from "ora"
 import ProcessManager from "./process-manager.js"
 
 export type FactBoxOptions = {
-  interval: NodeJS.Timer | null
+  interval: NodeJS.Timeout | null
   spinner: Ora
   processManager: ProcessManager
   message?: string
@@ -53,7 +53,7 @@ export const createFactBox = (
   spinner: Ora,
   title: string,
   processManager: ProcessManager
-): NodeJS.Timer => {
+): NodeJS.Timeout => {
   showFact(spinner, title)
   const interval = setInterval(() => {
     showFact(spinner, title)
@@ -65,12 +65,12 @@ export const createFactBox = (
 }
 
 export const resetFactBox = (
-  interval: NodeJS.Timer | null,
+  interval: NodeJS.Timeout | null,
   spinner: Ora,
   successMessage: string,
   processManager: ProcessManager,
   newTitle?: string
-): NodeJS.Timer | null => {
+): NodeJS.Timeout | null => {
   if (interval) {
     clearInterval(interval)
   }
@@ -90,7 +90,7 @@ export function displayFactBox({
   processManager,
   title = "",
   message = "",
-}: FactBoxOptions): NodeJS.Timer | null {
+}: FactBoxOptions): NodeJS.Timeout | null {
   if (!message) {
     return createFactBox(spinner, title, processManager)
   }

packages/create-medusa-app/src/utils/process-manager.ts

@@ -4,7 +4,7 @@ type ProcessOptions = {
 }
 
 export default class ProcessManager {
-  intervals: NodeJS.Timer[] = []
+  intervals: NodeJS.Timeout[] = []
   static MAX_RETRIES = 3
 
   constructor() {
@@ -20,7 +20,7 @@ export default class ProcessManager {
     process.on("SIGINT", () => fn())
   }
 
-  addInterval(interval: NodeJS.Timer) {
+  addInterval(interval: NodeJS.Timeout) {
     this.intervals.push(interval)
   }