feat: add shared UI package auth DI (#5720)

* feat: add shared UI package auth DI

* use refs instead of reactive

* pnpm prepr

* move app auth provider setup to src/providers/setup

apps/app-frontend/src/App.vue

@@ -106,6 +106,7 @@ import {
 } from '@/providers/download-progress.ts'
 import { createServerInstall, provideServerInstall } from '@/providers/server-install'
 import { setupProviders } from '@/providers/setup'
+import { setupAuthProvider } from '@/providers/setup/auth'
 import { useError } from '@/store/error.js'
 import { useLoading, useTheming } from '@/store/state'
 
@@ -454,6 +455,10 @@ const credentials = ref()
 
 const modrinthLoginFlowWaitModal = ref()
 
+setupAuthProvider(credentials, async (_redirectPath) => {
+	await signIn()
+})
+
 async function fetchCredentials() {
 	const creds = await getCreds().catch(handleError)
 	if (creds && creds.user_id) {