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/@jridgewell/trace-mapping/src/sourcemap-segment.ts

@@ -0,0 +1,23 @@
+type GeneratedColumn = number;
+type SourcesIndex = number;
+type SourceLine = number;
+type SourceColumn = number;
+type NamesIndex = number;
+
+type GeneratedLine = number;
+
+export type SourceMapSegment =
+  | [GeneratedColumn]
+  | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn]
+  | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn, NamesIndex];
+
+export type ReverseSegment = [SourceColumn, GeneratedLine, GeneratedColumn];
+
+export const COLUMN = 0;
+export const SOURCES_INDEX = 1;
+export const SOURCE_LINE = 2;
+export const SOURCE_COLUMN = 3;
+export const NAMES_INDEX = 4;
+
+export const REV_GENERATED_LINE = 1;
+export const REV_GENERATED_COLUMN = 2;