NIFI-15148 - Registry Clients - Support for branch creation

[pvillard31]

Summary

NIFI-15148 - Registry Clients - Support for branch creation

It requires apache/nifi-api#25 and a new NiFi API release.

Not very satisfied with the "Create Branch" modal view but I'm sure someone more familiar with the UI will be able to help getting something better.

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Tracking

Please complete the following tracking steps prior to pull request creation.

Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

Pull Request Formatting

• Pull Request based on current revision of the main branch
• Pull Request refers to a feature branch with one commit containing changes

Verification

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Build

• Build completed using ./mvnw clean install -P contrib-check
  • JDK 21
  • JDK 25

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
• New dependencies are documented in applicable LICENSE and NOTICE files

Documentation

• Documentation formatting appears as expected in rendered files