Add WorkflowCheck Gradle plugin module

[robzienert]

What changed?

• Added a new temporal-workflowcheck-gradle-plugin module
• Published a Gradle plugin with id io.temporal.workflowcheck
• The plugin detects the consumer's io.temporal:temporal-sdk version from runtimeClasspath, resolves the matching io.temporal:temporal-workflowcheck analyzer, and registers a workflowCheck verification task.
• Wired workflowCheck into the Gradle check lifecycle.
• Added configuration for source sets, failure behavior, valid-method output, default config suppression, extra config files, ASM override, and forked JVM heap size.
• Added Gradle TestKit coverage and module README usage documentation.

Why?

temporal-workflowcheck is useful for catching non-deterministic calls in Workflow implementations, but Gradle users currently need to wire the analyzer themselves. This module provides a first-party Gradle integration that automatically uses the analyzer version matching the Temporal Java SDK on the consuming project's classpath.

Breaking changes?

No.

Server PR

No server changes required.

Testing

We've been using this across many different project types within Netflix for a few months and have verified that this approach even for projects with massive classpaths.

• ./gradlew --no-daemon :temporal-workflowcheck-gradle-plugin:test
• ./gradlew --no-daemon :temporal-workflowcheck-gradle-plugin:spotlessCheck