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/yaml/dist/compose/resolve-block-scalar.d.ts

@@ -0,0 +1,11 @@
+import type { Range } from '../nodes/Node';
+import { Scalar } from '../nodes/Scalar';
+import type { BlockScalar } from '../parse/cst';
+import type { ComposeContext } from './compose-node';
+import type { ComposeErrorHandler } from './composer';
+export declare function resolveBlockScalar(ctx: ComposeContext, scalar: BlockScalar, onError: ComposeErrorHandler): {
+    value: string;
+    type: Scalar.BLOCK_FOLDED | Scalar.BLOCK_LITERAL | null;
+    comment: string;
+    range: Range;
+};