QR code generator, update readme

Added a QR code code generator that might be used for auth.

Updated README with better instructions for setting up Tahoe grid.

packages/src/routes/auth/login/+page.server.js

@@ -1,4 +1,3 @@
-import qrcode from 'qrcode'
 import { totp } from '$lib/utils'
 
 export const load = () => {

packages/src/routes/auth/login/+page.svelte

@@ -1,5 +1,6 @@
 <script>
   import { onDestroy } from 'svelte'
+  import encodeQR from '@paulmillr/qr'
 
   let { data, form } = $props()
 
@@ -7,6 +8,7 @@
   let count = $state(form?.seconds ?? data.seconds)
 
   const timer = setInterval(() => count--, 1000)
+  const qrCode = encodeQR(data.uri, 'svg')
 
   onDestroy(() => {
     clearInterval(timer)
@@ -30,6 +32,19 @@
   <p>Token: {form?.token ?? data.token}.</p>
   <p>Valid for {count}s.</p>
 
+  {#if qrCode}
+    <div class='qr-code'>
+      {@html qrCode}
+    </div>
+  {/if}
+
   <form action='?/getTotp' method='post' enctype='form-data' bind:this={totpForm}>
   </form>
 </div>
+
+<style>
+  .qr-code {
+    width: 15em;
+    margin: 0 auto;
+  }
+</style>