Feat(genai): October tools samples

[Guiners]

Description

Fixes #

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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 3 region tags.

• genai/tools/tools-google-maps-coordinates-with-txt.js:17, tag googlegenaisdk_tools_google_maps_coordinates_with_txt
• genai/tools/tools-google-search-and-urlcontext-with-txt.js:17, tag googlegenaisdk_tools_google_search_and_urlcontext_with_txt
• genai/tools/tools-urlcontext-with-txt.js:17, tag googlegenaisdk_tools_urlcontext_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 adds new Generative AI (GenAI) tool samples for October, focusing on integrating Google Maps coordinates, Google Search, and URL context functionalities with the Gemini API. The changes include new JavaScript sample files and their respective test files, demonstrating how to use these tools with the gemini-2.5-flash model.

Highlights

• New Samples for GenAI Tools: This pull request introduces three new samples demonstrating the use of various tools with the Google Generative AI SDK, specifically for the gemini-2.5-flash model.
• Google Maps Coordinates Tool: One sample showcases how to integrate the googleMaps tool, allowing the model to answer location-based queries by providing specific latitude and longitude coordinates.
• Google Search and URL Context Tools: Another sample combines the googleSearch and urlContext tools, enabling the model to process information from a specified URL (e.g., a Google Search results page) and generate a response based on that context.
• URL Context Tool: A third sample focuses solely on the urlContext tool, demonstrating how the model can compare information from multiple URLs to provide a summarized or comparative response.
• Associated Tests: Each new sample is accompanied by a corresponding test file to ensure functionality and provide examples of how to verify the output.

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[gemini-code-assist]

Code Review

Thank you for contributing these new samples for GenAI tools. I've reviewed the code and have a few suggestions to improve correctness and align with best practices. My main points are about the correct usage of Mocha's describe function in your tests and ensuring the right API version is used for beta features. Please see the detailed comments below.

[cfloress]

LGTM