feat: add support for Vaadin 25

[javier-godoy]

Close #104
Close #105

Summary by CodeRabbit

• Chores

  • Bumped project version to 3.3.0-SNAPSHOT.
  • Updated Lombok to version 1.18.42.
  • Added json-migration-helper dependency for enhanced JSON handling.
  • Replaced testbench dependency with improved alternative.

• Tests

  • Added integration test infrastructure for client terminal addon functionality.

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[coderabbitai]

Walkthrough

This PR upgrades the add-on from version 3.2.1-SNAPSHOT to 3.3.0-SNAPSHOT with Vaadin 25 compatibility support. It introduces version-aware JSON encoding via reflection-based MethodHandle resolution for ClientTerminalAddon, adds a json-migration-helper dependency, updates Lombok, replaces testbench dependencies, and establishes new integration test infrastructure for testing client-side terminal addons.

Changes

Cohort / File(s)	Summary
Dependency Management pom.xml	Version bumped to 3.3.0-SNAPSHOT; Lombok upgraded from 1.18.34 to 1.18.42; new dependency added: json-migration-helper:0.9.2; vaadin-testbench replaced with testbench-rpc:1.4.0 (test scope).
Core Library – Version-Aware Encoding src/main/java/com/flowingcode/vaadin/addons/xterm/ClientTerminalAddon.java	Replaces direct JsonCodec.encodeWithTypeInfo with dynamic MethodHandle-based resolution; encodes parameters based on Vaadin major version (Jackson for v>24, legacy JsonCodec for older versions); introduces JsonMigration.convertToJsonValue for result conversion and exception handling.
Core Library – Extension Annotations src/main/java/com/flowingcode/vaadin/addons/xterm/ITerminalConsole.java, src/main/java/com/flowingcode/vaadin/addons/xterm/XTermBase.java	Adds @ExtensionMethod(value = JsonMigration.class, suppressBaseMethods = true) annotations to both classes; enables extension method support without altering existing method signatures.
Integration Test Infrastructure src/test/java/com/flowingcode/vaadin/addons/xterm/integration/AbstractViewTest.java, IntegrationView.java, IntegrationViewCallables.java, SampleClientTerminalAddon.java, SampleClientTerminalAddonIT.java	AbstractViewTest constructor now defaults to IntegrationView.ROUTE; introduces new IntegrationView class with XTerm component configuration and ClientCallable method; new IntegrationViewCallables interface defines callable contract; SampleClientTerminalAddon extends ClientTerminalAddon with injectable JavaScript registration; SampleClientTerminalAddonIT provides test coverage for sample addon using RPC proxy.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• feat: add support for named terminal add-ons #99: Related infrastructure changes to ClientTerminalAddon and named add-on support in XTermBase that complement the version-aware encoding introduced in this PR.

Suggested reviewers

• mlopezFC
• paodb

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 7.69% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title 'feat: add support for Vaadin 25' accurately summarizes the main objective of the changeset, which centers on compatibility updates for Vaadin 25.
Linked Issues check	✅ Passed	The PR addresses both linked issues (#104 and #105) by implementing Vaadin version-aware encoding logic and integrating test cases that verify both color and history functionality work correctly.
Out of Scope Changes check	✅ Passed	All changes are directly related to Vaadin 25 support: dependency updates (json-migration-helper, testbench-rpc), version-aware encoding, extension methods for JSON migration, and integration tests for new functionality.

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✨ Finishing touches

• 📝 Generate docstrings

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[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In
`@src/test/java/com/flowingcode/vaadin/addons/xterm/integration/SampleClientTerminalAddonIT.java`:
- Around line 31-36: testSelectionFeature1 currently calls
$server.setSampleClientTerminalAddonValue(BAR) and immediately asserts
getSampleClientTerminalValue(term), which can race because
setSampleClientTerminalAddonValue is asynchronous; modify the test to wait for
the client-side addon value to appear before asserting (e.g., use a
TestBench/waitUntil or Awaitility loop that repeatedly calls
getSampleClientTerminalValue(term) until it equals BAR or a timeout is reached)
so the assertion only runs once the value is visible.