feat(genai): add tool samples (3)

[jdomingr]

Add new tool samples:

• Generate content with the Enterprise Web Search Tool
• Generate content with the Google Maps Tool
• Generate content with the Google Search and Url Context Tools

All local tests have passed

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• genai/api/GenAI.Samples/Tools/ToolsEnterpriseWebSearchWithTxt.cs:17, tag googlegenaisdk_tools_enterprise_web_search_with_txt
• genai/api/GenAI.Samples/Tools/ToolsGoogleMapsCoordinatesWithTxt.cs:17, tag googlegenaisdk_tools_google_maps_coordinates_with_txt
• genai/api/GenAI.Samples/Tools/ToolsGoogleSearchAndUrlContextWithTxt.cs:17, tag googlegenaisdk_tools_google_search_and_urlcontext_with_txt

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[gemini-code-assist]

Summary of Changes

Hello @jdomingr, 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 significantly expands the GenAI SDK's sample suite by integrating new examples for powerful generative AI tools. These additions provide developers with practical demonstrations of how to leverage Enterprise Web Search, Google Maps, and a combination of Google Search and URL Context within their applications, enhancing the SDK's utility and ease of adoption for advanced content generation scenarios.

Highlights

• New Tool Samples Added: This PR introduces three new C# samples demonstrating the use of various GenAI tools: Enterprise Web Search, Google Maps, and Google Search with URL Context.
• Enterprise Web Search Sample: A new sample ToolsEnterpriseWebSearchWithTxt.cs and its corresponding test ToolsEnterpriseWebSearchWithTxtTest.cs have been added, showcasing how to generate content using the Enterprise Web Search tool.
• Google Maps Tool Sample: A new sample ToolsGoogleMapsCoordinatesWithTxt.cs and its corresponding test ToolsGoogleMapsCoordinatesWithTxtTest.cs have been added, illustrating content generation with the Google Maps tool, including coordinate-based retrieval.
• Google Search and URL Context Tools Sample: A new sample ToolsGoogleSearchAndUrlContextWithTxt.cs and its corresponding test ToolsGoogleSearchAndUrlContextWithTxtTest.cs have been added, demonstrating how to combine Google Search and URL Context tools for content generation.

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[gemini-code-assist]

Code Review

This pull request adds three new samples demonstrating how to use different tools with the GenAI API: Enterprise Web Search, Google Maps, and a combination of Google Search and URL Context. The code is well-structured and the new samples are a valuable addition.

I've made a few suggestions to improve robustness and code style:

• In all three sample files, I've pointed out an unsafe access to the response content which could lead to runtime exceptions. I've suggested a safer way to extract the text.
• In the ToolsGoogleSearchAndUrlContextWithTxt sample, I've suggested a minor simplification for string construction to improve readability.