feat(genai): live samples part1

[Guiners]

Description

Fixes #

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
• Tests pass: npm test (see Testing)
• Lint pass: npm run lint (see Style)
• Required CI tests pass (see CI testing)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new sample directory, and I created GitHub Actions workflow for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

Note: Any check with (dev), (experimental), or (legacy) can be ignored and should not block your PR from merging (see CI testing).

[snippet-bot]

Here is the summary of changes.

You are about to add 5 region tags.

• genai/live/live-code-exec-with-txt.js:15, tag googlegenaisdk_live_code_exec_with_txt
• genai/live/live-conversation-audio-with-audio.js:15, tag googlegenaisdk_live_conversation_audio_with_audio
• genai/live/live-func-call-with-txt.js:15, tag googlegenaisdk_live_func_call_with_txt
• genai/live/live-ground-googsearch-with-txt.js:16, tag googlegenaisdk_live_ground_googsearch_with_txt
• genai/live/live-with-txt.js:15, tag googlegenaisdk_live_with_txt

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[gemini-code-assist]

Summary of Changes

Hello @Guiners, 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 delivers the first part of live samples for the Google GenAI SDK, providing developers with practical, real-time examples. These samples are designed to illustrate how to leverage the gemini-2.0-flash-live-preview-04-09 model for interactive applications, covering a spectrum of use cases from simple text chat to complex tool integrations like code execution and external search, thereby enhancing the SDK's documentation and usability.

Highlights

• New Live Samples for Google GenAI SDK: This pull request introduces a collection of new 'live' samples for the Google GenAI SDK, demonstrating real-time interaction capabilities with the Gemini 2.0 Flash Live Preview model.
• Diverse Interaction Modalities: The new samples cover various interaction modalities, including basic text conversations, audio-based conversations, and advanced functionalities like code execution, function calling, and Google Search grounding.
• Comprehensive Test Coverage: Each new live sample is accompanied by a dedicated test file, ensuring the functionality and reliability of the demonstrated features.

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[gemini-code-assist]

Code Review

This pull request introduces a set of live samples for the GenAI SDK, demonstrating features like code execution, audio conversations, function calling, and grounding with Google Search. The code is well-structured and provides good examples of how to use the live API.

My review includes a few suggestions for improvement:

• A recurring pattern of using polling with setTimeout to wait for messages is present in all samples. I've suggested a more efficient, event-driven approach.
• There is a potential bug in the audio conversation sample that could lead to a crash if a message times out. I've provided a fix for this.
• The audio sample also makes an assumption about the WAV file header size which could be brittle.
• There's a minor typo in a test filename (genai/test/live-conversation-audio-with-audio.js.test.js) which should be corrected for consistency to genai/test/live-conversation-audio-with-audio.test.js.

Overall, these are great additions. My feedback aims to make them more robust and efficient.

[cfloress]

Besides @jdomingr comment...... LGTM