feat(genai): add new tools samples

[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 Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.9 (see Test Environment Setup)
• Lint pass: nox -s lint (see Test Environment Setup)
• 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 sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners 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

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• genai/tools/tools_google_maps_coordinates_with_txt.py:17, tag googlegenaisdk_tools_google_maps_coordinates_with_txt
• genai/tools/tools_google_search_and_urlcontext_with_txt.py:17, tag googlegenaisdk_tools_google_search_and_urlcontext_with_txt
• genai/tools/tools_urlcontext_with_txt.py: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 expands the genai library's sample collection by introducing three new examples that demonstrate advanced usage of its integrated tools. These samples provide practical illustrations for leveraging Google Maps with precise location coordinates, utilizing URL context for content analysis, and combining Google Search with URL context for more robust information gathering, thereby enriching the developer's toolkit for building sophisticated AI applications.

Highlights

• New Google Maps Tool Sample: Added a new sample demonstrating how to use the Google Maps tool with coordinate-based grounding for location-aware queries.
• New URL Context Tool Sample: Introduced a new sample showcasing the URL Context tool, enabling content comparison and analysis from multiple specified URLs.
• Combined Google Search and URL Context Sample: Included a new sample that illustrates the integration of both Google Search and URL Context tools for comprehensive information retrieval and processing.
• Updated Test Suite: The test suite for GenAI tools has been updated to include imports and test functions for the newly added samples, ensuring their functionality.

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[gemini-code-assist]

Code Review

This pull request introduces new Python samples for Google GenAI tools, demonstrating features like Google Maps with coordinates, URL context for grounding, and combining Google Search with URL context. The additions are valuable, but I've identified a critical issue where two of the new samples are not runnable as-is due to empty URL variables, which undermines their purpose as examples. I've provided suggestions with placeholder URLs to fix this. I also found some minor areas for improvement regarding code style, such as inconsistent API versioning, opportunities for more concise code, and missing newlines at the end of files, all of which I've commented on with suggestions.