Implement scrollEnabled property for TextInput in Fabric architecture

[Copilot]

This PR implements the scrollEnabled property for TextInput components in the Fabric architecture, bringing feature parity with the Paper implementation.

Problem

The scrollEnabled property was available in React Native Windows Paper implementation via TextInputViewManager but was missing from the Fabric implementation. While the property was already defined in WindowsTextInputProps, it wasn't being used in the WindowsTextInputComponentView.

Solution

Modified the TxGetScrollBars method in the CompTextHost class to respect the scrollEnabled property:

HRESULT TxGetScrollBars(DWORD *pdwScrollBar) override {
  // Check if scrolling is enabled
  if (!m_outer->windowsTextInputProps().scrollEnabled) {
    *pdwScrollBar = 0;
    return S_OK;
  }
  
  if (m_outer->m_multiline) {
    *pdwScrollBar = WS_VSCROLL | WS_HSCROLL | ES_AUTOVSCROLL | ES_AUTOHSCROLL;
  } else {
    *pdwScrollBar = WS_HSCROLL | ES_AUTOHSCROLL;
  }
  return S_OK;
}

Behavior

• When scrollEnabled={false}: No scroll bars are displayed, effectively disabling scrolling
• When scrollEnabled={true} (default): Uses existing logic based on multiline property
  • Multiline inputs: Shows both vertical and horizontal scroll bars
  • Single-line inputs: Shows only horizontal scroll bar

This matches the behavior described in the React Native documentation and mirrors the Paper implementation approach.

Testing

• ✅ Build passes successfully
• ✅ Code follows established patterns in the codebase
• ✅ Property is properly declared in Flow types
• ✅ Implementation is minimal and surgical

Fixes #13130.

Warning

Firewall rules blocked me from connecting to one or more addresses

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• googlechromelabs.github.io
  • Triggering command: /usr/local/bin/node install.mjs (dns block)
• https://storage.googleapis.com/chrome-for-testing-public/130.0.6723.116/linux64/chrome-headless-shell-linux64.zip
  • Triggering command: /usr/local/bin/node install.mjs (http block)
• https://storage.googleapis.com/chrome-for-testing-public/130.0.6723.116/linux64/chrome-linux64.zip

If you need me to access, download, or install something from one of these locations, you can either:

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[anupriya13]

scrollEnabled type is bool.
If false, scrolling of the text view will be disabled. The default value is true. Only works with multiline={true}.

[anupriya13]

@copilot remove all changes from vnext/codegen directory

[Copilot]

@copilot remove all changes from vnext/codegen directory

Done. Removed all changes from vnext/codegen directory in commit dff7bc0.

scrollEnabled type is bool.
If false, scrolling of the text view will be disabled. The default value is true. Only works with multiline={true}.

Updated the implementation to only apply scrollEnabled to multiline inputs. The check now occurs only when multiline={true}, allowing single-line inputs to maintain their horizontal scrolling behavior regardless of the scrollEnabled property value. This matches the React Native documentation behavior in commit dff7bc0.