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/nodes/Pair.d.ts

@@ -0,0 +1,22 @@
+import type { CreateNodeContext } from '../doc/createNode';
+import type { CollectionItem } from '../parse/cst';
+import type { Schema } from '../schema/Schema';
+import type { StringifyContext } from '../stringify/stringify';
+import { addPairToJSMap } from './addPairToJSMap';
+import { NODE_TYPE } from './identity';
+import type { Node } from './Node';
+import type { ToJSContext } from './toJS';
+export declare function createPair(key: unknown, value: unknown, ctx: CreateNodeContext): Pair<Node, Node>;
+export declare class Pair<K = unknown, V = unknown> {
+    readonly [NODE_TYPE]: symbol;
+    /** Always Node or null when parsed, but can be set to anything. */
+    key: K;
+    /** Always Node or null when parsed, but can be set to anything. */
+    value: V | null;
+    /** The CST token that was composed into this pair.  */
+    srcToken?: CollectionItem;
+    constructor(key: K, value?: V | null);
+    clone(schema?: Schema): Pair<K, V>;
+    toJSON(_?: unknown, ctx?: ToJSContext): ReturnType<typeof addPairToJSMap>;
+    toString(ctx?: StringifyContext, onComment?: () => void, onChompKeep?: () => void): string;
+}