Add server status page and a badge in AppBar (#182)

* WIP: Add server status and running process indicators

* Finish ServerStatusPage and ServerRunningProcess

* fix typos, add running process info to the server status page

* Remove ServerRunningProcess and integrate it into ServerStatusBadge

* remove divider in menu

* display time as started X minutes ago

* add documentation; clearly state what new components are; update readme

* change wording a bit, cross-link with docs/README.md

* use returned HTML

* Finish ServerStatus page and badges

* Fix types

* cleanup

* remove some code

* adjust config load

src/components/AdminLayout.tsx

@@ -4,6 +4,7 @@ import { useEffect, useState, Suspense } from "react";
 import { Icons, DefaultIcon } from "../utils/icons";
 import { MenuItem, GetConfig, ClearConfig } from "../utils/config";
 import Footer from "./Footer";
+import ServerStatusBadge from "./etke.cc/ServerStatusBadge";
 
 const AdminUserMenu = () => {
   const [open, setOpen] = useState(false);
@@ -48,6 +49,7 @@ const AdminUserMenu = () => {
 const AdminAppBar = () => {
   return (<AppBar userMenu={<AdminUserMenu />}>
     <TitlePortal />
+    <ServerStatusBadge />
     <InspectorButton />
   </AppBar>);
 };