[Task] Update examples to consume independent shenyu-client-java artifacts

[Aias00]

Description

Background

After Java client modules are split into shenyu-client-java, examples in the main ShenYu repository should demonstrate how users consume the independent client artifacts instead of relying on source modules
inside the main repo.

Tasks

• Inventory examples that use Java client modules.
• Identify examples still depending on main repo client source modules.
• Update Spring MVC example to use independent client artifact.
• Update Dubbo example if applicable.
• Update gRPC example if applicable.
• Update WebSocket example if applicable.
• Add or update MCP client example if applicable.
• Verify examples can register with local admin/bootstrap.
• Document how to override client artifact version for local testing.

Expected Output

Updated examples and documentation.

Acceptance Criteria

• At least one Spring MVC example uses the independent client artifact.
• The example can register successfully with admin/bootstrap.
• The documentation explains how contributors can test unreleased client artifacts locally.

Task List

No response

[github-actions]

👋 Hello @Aias00

A new issue has been opened by @Aias00:

• Title: [Task] Update examples to consume independent shenyu-client-java artifacts
• Link: [Task] Update examples to consume independent shenyu-client-java artifacts #6371

Please review when you have time. Thank you! 🙏