Afry/tg 24054 write tests to annotation

[aidenblue]

https://diffblue.atlassian.net/browse/TG-24054

[Copilot]

Pull request overview

This PR introduces the @WriteTestsTo annotation that allows users to specify custom test class names for Diffblue Cover-generated tests. The annotation provides class-level control over test organization, overriding the default --class-name-template configuration.

Key changes:

• Added the @WriteTestsTo annotation with runtime retention and type-level targeting
• Created an example demonstrating the annotation's usage
• Updated package version from 1.8.0 to 1.9.0
• Added comprehensive documentation section explaining the annotation's purpose and usage

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/main/java/com/diffblue/cover/annotations/WriteTestsTo.java	New annotation definition with documentation specifying alphanumeric test class names and same-package placement
src/test/java/com/example/WriteTestsToExample.java	Example class demonstrating @WriteTestsTo annotation usage with simple test methods
pom.xml	Version bump from 1.8.0 to 1.9.0 to reflect new annotation feature
README.md	Added "Test Organization Annotations" section with usage examples and formatting improvements throughout

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