[WIP] Replace Micronaut nullability annotations with JSpecify

[Copilot]

• Identify all files with Micronaut nullability annotations
• Replace io.micronaut.core.annotation.Nullable with org.jspecify.annotations.Nullable
• Replace io.micronaut.core.annotation.NonNull with org.jspecify.annotations.NonNull
• Update r2dbc-core files: BasicR2dbcProperties.java, DefaultBasicR2dbcProperties.java
• Update doc-examples Java files: AuthorRepository.java, BookRepository.java
• Update doc-examples Groovy files: AuthorRepository.groovy, BookRepository.groovy
• Update test-graalvm files: OwnerDto.java, TestApp.java

All 8 files have been updated to use JSpecify annotations instead of Micronaut annotations.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Replace Micronaut nullability annotations with JSpecify nullability annotation</issue_title>
<issue_description>Replace usages of io.micronaut.core.annotation.Nullable with org.jspecify.annotations.Nullable and usages of io.micronaut.core.annotation.NonNull with org.jspecify.annotations.NonNull.

Don't add the jspecify dependency to the project. Don't attempt to compile the project. t is ok if the project does not compile. The PR base should be the default branch of the repository.

Once you create a PR, ask for a review from @sdelamo</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Replace Micronaut nullability annotations with JSpecify nullability annotation #847

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[sdelamo]

@copilot please retry

[Copilot]

@copilot please retry

Done. I've replaced all Micronaut nullability annotations with JSpecify annotations in commit 3da4635.

Updated 8 files:

• r2dbc-core/src/main/java/io/micronaut/r2dbc/BasicR2dbcProperties.java
• r2dbc-core/src/main/java/io/micronaut/r2dbc/DefaultBasicR2dbcProperties.java
• doc-examples/example-java/src/main/java/example/AuthorRepository.java
• doc-examples/example-java/src/main/java/example/BookRepository.java
• doc-examples/example-groovy/src/main/groovy/example/AuthorRepository.groovy
• doc-examples/example-groovy/src/main/groovy/example/BookRepository.groovy
• test-graalvm/common/src/main/java/testgraalvm/controllers/dto/OwnerDto.java
• test-graalvm/common-tests/src/main/java/example/controllers/TestApp.java