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/react-native/React/Fabric/RCTScheduler.h

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+#import <memory>
+
+#import <react/renderer/componentregistry/ComponentDescriptorFactory.h>
+#import <react/renderer/core/ComponentDescriptor.h>
+#import <react/renderer/core/EventListener.h>
+#import <react/renderer/core/LayoutConstraints.h>
+#import <react/renderer/core/LayoutContext.h>
+#import <react/renderer/mounting/MountingCoordinator.h>
+#import <react/renderer/scheduler/SchedulerToolbox.h>
+#import <react/renderer/scheduler/SurfaceHandler.h>
+#import <react/renderer/uimanager/UIManager.h>
+#import <react/utils/ContextContainer.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Exactly same semantic as `facebook::react::SchedulerDelegate`.
+ */
+@protocol RCTSchedulerDelegate
+
+- (void)schedulerDidFinishTransaction:(std::shared_ptr<const facebook::react::MountingCoordinator>)mountingCoordinator;
+
+- (void)schedulerShouldRenderTransactions:
+    (std::shared_ptr<const facebook::react::MountingCoordinator>)mountingCoordinator;
+
+- (void)schedulerShouldMergeReactRevision:(facebook::react::SurfaceId)surfaceId;
+
+- (void)schedulerDidDispatchCommand:(const facebook::react::ShadowView &)shadowView
+                        commandName:(const std::string &)commandName
+                               args:(const folly::dynamic &)args;
+
+- (void)schedulerDidSendAccessibilityEvent:(const facebook::react::ShadowView &)shadowView
+                                 eventType:(const std::string &)eventType;
+
+- (void)schedulerDidSetIsJSResponder:(BOOL)isJSResponder
+                blockNativeResponder:(BOOL)blockNativeResponder
+                       forShadowView:(const facebook::react::ShadowView &)shadowView;
+
+- (void)schedulerDidSynchronouslyUpdateViewOnUIThread:(facebook::react::Tag)reactTag props:(folly::dynamic)props;
+@end
+
+/**
+ * `facebook::react::Scheduler` as an Objective-C class.
+ */
+@interface RCTScheduler : NSObject
+
+@property (atomic, weak, nullable) id<RCTSchedulerDelegate> delegate;
+@property (readonly) const std::shared_ptr<facebook::react::UIManager> uiManager;
+
+- (instancetype)initWithToolbox:(facebook::react::SchedulerToolbox)toolbox;
+
+- (void)registerSurface:(const facebook::react::SurfaceHandler &)surfaceHandler;
+- (void)unregisterSurface:(const facebook::react::SurfaceHandler &)surfaceHandler;
+
+- (const facebook::react::ComponentDescriptor *)findComponentDescriptorByHandle_DO_NOT_USE_THIS_IS_BROKEN:
+    (facebook::react::ComponentHandle)handle;
+
+- (void)setupAnimationDriver:(const facebook::react::SurfaceHandler &)surfaceHandler;
+
+- (void)onAnimationStarted;
+
+- (void)onAllAnimationsComplete;
+
+- (void)animationTick;
+
+- (void)reportMount:(facebook::react::SurfaceId)surfaceId;
+
+- (void)addEventListener:(const std::shared_ptr<facebook::react::EventListener> &)listener;
+
+- (void)removeEventListener:(const std::shared_ptr<facebook::react::EventListener> &)listener;
+
+@end
+
+NS_ASSUME_NONNULL_END