fix(emulator): skip legacy monkeypatching for firebase-functions v7+

[taeold]

Detects firebase-functions v7+ in the emulator runtime and skips legacy stubs and config helpers that are incompatible with the new SDK version, preserving backward compatibility for older versions.

[gemini-code-assist]

Summary of Changes

Hello @taeold, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the Firebase emulator's compatibility by introducing version-aware logic for the firebase-functions SDK. It specifically addresses changes in firebase-functions v7.0.0 and above, preventing the application of outdated stubs and configuration helpers that are incompatible with the newer SDK. This ensures that the emulator operates correctly across various firebase-functions versions, preserving functionality for both legacy and modern projects.

Highlights

• Firebase Functions v7+ Detection: The emulator now includes logic to detect if firebase-functions v7.0.0 or newer is being utilized in the project.
• Skipping Legacy Stubs: When firebase-functions v7.0.0 or higher is detected, the emulator will skip applying legacy stubs that are incompatible with the newer SDK version.
• Skipping Legacy Config Helper: Similarly, the legacy functions.config() helper, which is not compatible with v7.0.0+, will be bypassed for newer firebase-functions versions.
• Backward Compatibility: These changes ensure that the emulator maintains backward compatibility, allowing older versions of firebase-functions to continue functioning correctly while properly handling the new SDK versions.

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[gemini-code-assist]

Code Review

This pull request correctly adds a version check to skip legacy monkeypatching for firebase-functions v7 and newer. My review focuses on improving the implementation by addressing code duplication. The version check and firebase-functions module resolution are performed in multiple places. I've suggested a refactoring to centralize this logic in the initializeRuntime function. This will make the code more efficient by avoiding redundant module lookups and more maintainable by removing duplicated code.