feat(a2a): Support handle A2A request as a server and add a2a-spring-boot-starter.

[KomachiSion]

AgentScope-Java Version

1.0.3

Description

Support handle agent request by A2A protocol.

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

[codecov]

Codecov Report

❌ Patch coverage is 78.21901% with 181 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...e/a2a/server/executor/AgentScopeAgentExecutor.java	35.26%	101 Missing and 11 partials ⚠️
...ng/boot/a2a/properties/A2aAgentCardProperties.java	44.18%	24 Missing ⚠️
...agentscope/core/a2a/server/utils/NetworkUtils.java	45.00%	6 Missing and 5 partials ⚠️
...ver/transport/jsonrpc/JsonRpcTransportWrapper.java	89.47%	4 Missing and 4 partials ⚠️
...ring/boot/a2a/controller/A2aJsonRpcController.java	80.55%	6 Missing and 1 partial ⚠️
...pring/boot/a2a/properties/A2aCommonProperties.java	36.36%	7 Missing ⚠️
...pring/boot/a2a/AgentscopeA2aAutoConfiguration.java	91.66%	1 Missing and 2 partials ⚠️
.../a2a/server/card/AgentScopeAgentCardConverter.java	97.10%	0 Missing and 2 partials ⚠️
.../core/a2a/server/constants/A2aServerConstants.java	0.00%	2 Missing ⚠️
...cope/core/a2a/server/utils/MessageConvertUtil.java	91.30%	1 Missing and 1 partial ⚠️
... and 3 more

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Pull request overview

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