feat: Implement array and collection items schema generation in ToolSchemaGenerator and add a corresponding test.

[Aias00]

AgentScope-Java Version

[The version of AgentScope-Java you are working on, e.g. 1.0.2, check your pom.xml dependency version or run mvn dependency:tree | grep agentscope-parent:pom(only mac/linux)]

Description

[Please describe the background, purpose, changes made, and how to test this PR]
fixes: #197

Checklist

Please check the following items before code is ready to be reviewed.

• Code has been formatted with mvn spotless:apply
• All tests are passing (mvn test)
• Javadoc comments are complete and follow project conventions
• Related documentation has been updated (e.g. links, examples, etc.)
• Code is ready for review

[Copilot]

Pull request overview

This PR implements automatic generation of the items property for array and collection type parameters in JSON schemas, fixing issue #197. Previously, array parameters lacked the required items schema property, which is essential for OpenAI's function calling API to understand the element types.

• Added logic to detect array and Collection types and automatically generate the items schema with the appropriate element type
• Implemented support for both Java arrays (e.g., String[]) and parameterized Collections (e.g., List<String>)
• Added test coverage to verify that array parameters correctly include the items property with the expected element type

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
agentscope-core/src/main/java/io/agentscope/core/tool/ToolSchemaGenerator.java	Implements array/collection items schema generation by detecting array types and extracting component types through reflection, with a fallback to "string" type when component type cannot be determined
agentscope-core/src/test/java/io/agentscope/core/tool/ToolSchemaGeneratorTest.java	Adds test to verify that array parameters generate schemas with the correct items property containing the element type

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[codecov]

Codecov Report

❌ Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
.../java/io/agentscope/core/util/JsonSchemaUtils.java	50.00%	3 Missing ⚠️

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