Commits on Oct 10, 2023

1. Make the Fabric Interop layer work in Bridgeless (facebook#40732) …

   Summary:
   
   This change allows the Fabric Interop Layer to work in bridgeless mode.
   
   Given that the legacy components requires a Bridge to send events and use commands, this change simulates a bridge when it doesn't exists (i.e.: we are in bridgeless mode).
   
   In order to make it work, we had to simulate a few elements from the Bridge and the UIManager.
   
   ## Changelog:
   [iOS][Fixed] - Make the Fabric interop layer works in bridgeless mode.
   
   ## Facebook:
   As an alternative approach, we could have created a `protocol RCTBridging`, have the `RCTBridge` conform to that protocol, and create a new type for it.
   Practically this would have been much more cumbersome:
   1. The [RCTBridge](https://www.internalfb.com/code/fbsource/[916531b9bf7a9943036807f7563c925b4c3e0101]/xplat/js/react-native-github/packages/react-native/React/Base/RCTBridge.h?lines=87-238) interface is quite big. All the props and method should be part of the protocol.
   2. Extensions declared on RCTBridge would not have worked. For example, [`RCTBridge (RCTUIManager)`](https://www.internalfb.com/code/fbsource/[916531b9bf7a9943036807f7563c925b4c3e0101]/xplat/js/react-native-github/packages/react-native/React/Modules/RCTUIManager.h?lines=170-174).
   3. It would require a major overhaul of the APIs, returning `id<RCTBridging>` in place of **every** function that takes/return an instance of `RCTBridge *`.
   
   Clearly, not a feasible way to go.
   
   Reviewed By: RSNara
   
   Differential Revision: D50079929

   

   Riccardo Cipolleschi authored and facebook-github-bot committed Oct 10, 2023
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