Adds new tile on the admin home page with system data. (#301)

* Adds new tile on the admin home page with system data. Also fixes the active users bug in the pie chart

* Fixes missing parentheses

* Updates user stats cache when signing in

* Reads active number of users from session provider

* Removes unused variable

* Small improvements

* Removes acl properties from system data websocket and performs initial push of data

* fix: remove acl fetch

---------

Co-authored-by: DecDuck <declanahofmeyr@gmail.com>

server/api/v1/auth/odic/callback.get.ts

@@ -1,6 +1,7 @@
 import sessionHandler from "~/server/internal/session";
 import authManager from "~/server/internal/auth";
 import type { Session } from "~/server/internal/session/types";
+import userStatsManager from "~/server/internal/userstats";
 
 defineRouteMeta({
   openAPI: {
@@ -61,6 +62,7 @@ export default defineEventHandler(async (h3) => {
       `/auth/mfa?redirect=${result.options.redirect ? encodeURIComponent(result.options.redirect) : "/"}`,
     );
   }
+  await userStatsManager.cacheUserSessions();
 
   if (result.options.redirect) {
     return sendRedirect(h3, result.options.redirect);