Add JRPC API, reworked Login and User pages

Frontend/src/pages/login/TF/CodeInput.svelte

@@ -0,0 +1,27 @@
+<script>
+  import Cleave from "cleave.js";
+  import { onMount } from "svelte";
+  import Error from "../Error.svelte";
+
+  // export let label;
+  export let value;
+  export let length = 6;
+
+  let input;
+  onMount(() => {
+    const cleaveCustom = new Cleave(input, {
+      blocks: [length / 2, length / 2],
+      delimiter: " ",
+      numericOnly: true,
+    });
+  });
+</script>
+
+<div class="floating group">
+  <input id="code-input" bind:this={input} autofocus bind:value />
+  <span class="highlight" />
+  <span class="bar" />
+  <label for="code-input">Code</label>
+
+  <Error />
+</div>