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/reader.d.ts

@@ -0,0 +1,15 @@
+/// <reference types="node" />
+import * as fs from 'fs';
+import * as fsStat from '@nodelib/fs.stat';
+import Settings from '../settings';
+import { Entry, ErrnoException, Pattern, ReaderOptions } from '../types';
+export default abstract class Reader<T> {
+    protected readonly _settings: Settings;
+    protected readonly _fsStatSettings: fsStat.Settings;
+    constructor(_settings: Settings);
+    abstract dynamic(root: string, options: ReaderOptions): T;
+    abstract static(patterns: Pattern[], options: ReaderOptions): T;
+    protected _getFullEntryPath(filepath: string): string;
+    protected _makeEntry(stats: fs.Stats, pattern: Pattern): Entry;
+    protected _isFatalError(error: ErrnoException): boolean;
+}