FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/better-sqlite3/lib/methods/serialize.js

@@ -0,0 +1,16 @@
+'use strict';
+const { cppdb } = require('../util');
+
+module.exports = function serialize(options) {
+	if (options == null) options = {};
+
+	// Validate arguments
+	if (typeof options !== 'object') throw new TypeError('Expected first argument to be an options object');
+
+	// Interpret and validate options
+	const attachedName = 'attached' in options ? options.attached : 'main';
+	if (typeof attachedName !== 'string') throw new TypeError('Expected the "attached" option to be a string');
+	if (!attachedName) throw new TypeError('The "attached" option cannot be an empty string');
+
+	return this[cppdb].serialize(attachedName);
+};