feat(genai): add new tool samples

[jdomingr]

Description

Add new tool samples:

• Generate content with Google Maps Tool
• Generate content with Google Search and Url Context Tool
• Generate content with Url Context Tool

Checklist

• I have followed Sample Format Guide
• Tests pass: mvn clean verify required
• Lint passes: mvn -P lint checkstyle:check required
• Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• Please merge this PR for me once it is approved

[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 generative AI tool samples by introducing new examples for Google Maps, Google Search, and URL Context. These additions provide developers with practical demonstrations of how to leverage these powerful tools to enhance content generation capabilities within their applications, covering scenarios from location-based queries to URL content analysis.

Highlights

• New Google Maps Tool Sample: Added a new Java sample demonstrating how to generate content using the Google Maps Tool, including location-aware grounding with coordinates.
• New Google Search and URL Context Tool Sample: Introduced a new Java sample that showcases content generation by combining the Google Search and URL Context Tools to process information from a given URL.
• New URL Context Tool Sample: Added a new Java sample illustrating how to generate content by comparing information from multiple URLs using the URL Context Tool.
• Integration Tests: New integration tests have been added to validate the functionality of the newly introduced tool samples.

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[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• genai/snippets/src/main/java/genai/tools/ToolsGoogleMapsCoordinatesWithTxt.java:19, tag googlegenaisdk_tools_google_maps_coordinates_with_txt
• genai/snippets/src/main/java/genai/tools/ToolsGoogleSearchAndUrlContextWithTxt.java:19, tag googlegenaisdk_tools_google_search_and_urlcontext_with_txt
• genai/snippets/src/main/java/genai/tools/ToolsUrlContextWithTxt.java:19, tag googlegenaisdk_tools_urlcontext_with_txt

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[gemini-code-assist]

Code Review

This pull request adds several new samples demonstrating the use of GenAI tools like Google Maps, Google Search, and URL Context. The changes are well-structured and the new samples are a valuable addition. My review includes a suggestion to improve the robustness of response handling in one of the new samples to prevent silent failures, and a couple of suggestions to enhance the corresponding tests to ensure they fully cover the samples' functionality.