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/Libraries/StyleSheet/flattenStyle.js

@@ -0,0 +1,56 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+'use strict';
+
+import type AnimatedNode from '../Animated/nodes/AnimatedNode';
+import type {
+  ____DangerouslyImpreciseAnimatedStyleProp_Internal,
+  ____FlattenStyleProp_Internal,
+} from './StyleSheetTypes';
+
+type NonAnimatedNodeObject<TStyleProp> = TStyleProp extends AnimatedNode
+  ? empty
+  : TStyleProp;
+
+function flattenStyle<
+  TStyleProp: ____DangerouslyImpreciseAnimatedStyleProp_Internal,
+>(
+  style: ?TStyleProp,
+  // $FlowFixMe[underconstrained-implicit-instantiation]
+): ?NonAnimatedNodeObject<____FlattenStyleProp_Internal<TStyleProp>> {
+  if (style === null || typeof style !== 'object') {
+    return undefined;
+  }
+
+  if (!Array.isArray(style)) {
+    // $FlowFixMe[incompatible-type]
+    return style;
+  }
+
+  const result: {[string]: $FlowFixMe} = {};
+  for (let i = 0, styleLength = style.length; i < styleLength; ++i) {
+    // $FlowFixMe[underconstrained-implicit-instantiation]
+    const computedStyle = flattenStyle(style[i]);
+    if (computedStyle) {
+      // $FlowFixMe[invalid-in-rhs]
+      for (const key in computedStyle) {
+        // $FlowFixMe[incompatible-use]
+        // $FlowFixMe[invalid-computed-prop]
+        // $FlowFixMe[prop-missing]
+        result[key] = computedStyle[key];
+      }
+    }
+  }
+  // $FlowFixMe[incompatible-type]
+  return result;
+}
+
+export default flattenStyle;