feat: Add presence heartbeat for Matrix online status

- matrix-gateway: POST /internal/matrix/presence/online endpoint
- usePresenceHeartbeat hook with activity tracking
- Auto away after 5 min inactivity
- Offline on page close/visibility change
- Integrated in MatrixChatRoom component

node_modules/fast-glob/out/readers/async.d.ts

@@ -0,0 +1,10 @@
+import * as fsWalk from '@nodelib/fs.walk';
+import { Entry, ReaderOptions, Pattern } from '../types';
+import Reader from './reader';
+import ReaderStream from './stream';
+export default class ReaderAsync extends Reader<Promise<Entry[]>> {
+    protected _walkAsync: typeof fsWalk.walk;
+    protected _readerStream: ReaderStream;
+    dynamic(root: string, options: ReaderOptions): Promise<Entry[]>;
+    static(patterns: Pattern[], options: ReaderOptions): Promise<Entry[]>;
+}