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/semver/ranges/to-comparators.js

@@ -0,0 +1,10 @@
+'use strict'
+
+const Range = require('../classes/range')
+
+// Mostly just for testing and legacy API reasons
+const toComparators = (range, options) =>
+  new Range(range, options).set
+    .map(comp => comp.map(c => c.value).join(' ').trim().split(' '))
+
+module.exports = toComparators