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/html-entities/lib/index.d.ts

@@ -0,0 +1,20 @@
+export declare type Level = 'xml' | 'html4' | 'html5' | 'all';
+interface CommonOptions {
+    level?: Level;
+}
+export declare type EncodeMode = 'specialChars' | 'nonAscii' | 'nonAsciiPrintable' | 'extensive';
+export interface EncodeOptions extends CommonOptions {
+    mode?: EncodeMode;
+    numeric?: 'decimal' | 'hexadecimal';
+}
+export declare type DecodeScope = 'strict' | 'body' | 'attribute';
+export interface DecodeOptions extends CommonOptions {
+    scope?: DecodeScope;
+}
+/** Encodes all the necessary (specified by `level`) characters in the text */
+export declare function encode(text: string | undefined | null, { mode, numeric, level }?: EncodeOptions): string;
+/** Decodes a single entity */
+export declare function decodeEntity(entity: string | undefined | null, { level }?: CommonOptions): string;
+/** Decodes all entities in the text */
+export declare function decode(text: string | undefined | null, { level, scope }?: DecodeOptions): string;
+export {};