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>

composables/admin-home.ts

@@ -0,0 +1,21 @@
+import type { SerializeObject } from "nitropack";
+import type { SystemData } from "~/server/internal/system-data";
+
+const ws = new WebSocketHandler("/api/v1/admin/system-data/ws");
+
+export const useSystemData = () =>
+  useState<SerializeObject<SystemData>>(
+    "system-data",
+    (): SystemData => ({
+      totalRam: 0,
+      freeRam: 0,
+      cpuLoad: 0,
+      cpuCores: 0,
+    }),
+  );
+
+ws.listen((systemDataString) => {
+  const data = JSON.parse(systemDataString) as SerializeObject<SystemData>;
+  const systemData = useSystemData();
+  systemData.value = data;
+});