Add module-windows-setup command for streamlined RNW community module integration

[Copilot]

This PR implements a new module-windows-setup command that provides a complete one-line solution for setting up React Native modules for Windows development with the New Architecture (Fabric).

What this command does

The yarn react-native module-windows-setup command automates the entire setup process:

1. Creates TurboModule specification - Generates a comprehensive spec file with examples if one doesn't exist
2. Updates package.json - Adds Windows codegen configuration automatically
3. Manages dependencies - Cleans node_modules, installs dependencies, and upgrades RN/RNW to latest versions
4. Sets up Windows project - Runs init-windows --template cpp-lib with proper configuration
5. Generates code - Executes codegen-windows to create Windows-specific bindings
6. Creates C++ stubs - Automatically generates complete header and implementation files with method stubs

Key features

• Smart spec generation: Creates detailed TurboModule specs with examples for all common types (strings, numbers, booleans, promises, callbacks, constants)
• Intelligent C++ stub creation: Parses generated spec files to extract exact method signatures and creates production-ready C++ stubs
• Non-destructive: Only creates files that don't exist to avoid overwriting user changes
• Comprehensive error handling: Uses standard RNW error codes and provides clear feedback
• Integration with existing CLI: Built on the same infrastructure as other RNW commands

Usage

# Basic usage
yarn react-native module-windows-setup

# With options
yarn react-native module-windows-setup --name MyModule --logging --overwrite

Example output

For a module with methods like processString(input: string) and calculateValue(x: number, y: number), the command generates:

// MyModuleModule.h
REACT_MODULE(MyModuleModule)
struct MyModuleModule {
    using ModuleSpec = MyModuleSpec;
    
    REACT_METHOD(processString)
    std::string processString(std::string input) noexcept;
    
    REACT_METHOD(calculateValue)
    double calculateValue(double x, double y) noexcept;
};

// MyModuleModule.cpp with stub implementations
std::string MyModuleModule::processString(std::string input) noexcept {
    // TODO: Implement processString
    return "";
}

This eliminates the need for manual setup and allows developers to focus on implementing their module's functionality rather than dealing with configuration and boilerplate.

Fixes #15078.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• googlechromelabs.github.io
• 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)

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

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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