Feature/add operation id to documentation

[garygitton]

I added this field to be able to personalized methods of the sdks generated with swagger-codegen and zf-apigility-documentation-swagger.

Note: this depends on zfcampus/zf-apigility-documentation#70

[weierophinney]

This repository has been closed and moved to laminas-api-tools/api-tools-documentation-swagger; a new issue has been opened at https://github.com/laminas-api-tools/api-tools-documentation-swagger/issues/4.

[weierophinney]

This repository has been moved to laminas-api-tools/api-tools-documentation-swagger. If you feel that this patch is still relevant, please re-open against that repository, and reference this issue. To re-open, we suggest the following workflow:

• Squash all commits in your branch (git rebase -i origin/{branch})
• Make a note of all changed files (`git diff --name-only origin/{branch}...HEAD
• Run the laminas/laminas-migration tool on the code.
• Clone laminas-api-tools/api-tools-documentation-swagger to another directory.
• Copy the files from the second bullet point to the clone of laminas-api-tools/api-tools-documentation-swagger.
• In your clone of laminas-api-tools/api-tools-documentation-swagger, commit the files, push to your fork, and open the new PR. We will be providing tooling via laminas/laminas-migration soon to help automate the process.