Add JRPC API, reworked Login and User pages

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

@@ -0,0 +1,21 @@
+<script lang="ts">
+  import Error from "../Error.svelte";
+  import loginState from "../state";
+  import CodeInput from "./CodeInput.svelte";
+
+  export let id: string;
+  export let name: string;
+
+  let code: string = "";
+
+  function send() {
+    loginState.useTOTP(id, code);
+  }
+</script>
+
+<h3>TOTP {name}</h3>
+<CodeInput bind:value={code} length={6} />
+
+<div class="actions">
+  <button class="btn btn-primary btn-wide" on:click={send}> Send </button>
+</div>