Add new Misk Kotlin OpenAPI Generator

[andrewwilsonnew]

to close #20883

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in Git BASH)
  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
  These must match the expectations made by your contribution.
  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.
  IMPORTANT: Do NOT purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.
• File the PR against the correct branch: master (upcoming 7.x.0 minor release - breaking changes with fallbacks), 8.0.x (breaking changes without fallbacks)
• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

[wing328]

thanks for the PR

please add a new petstore script to test this generator and generate the samples (including in this PR)

then add the sample folder to the github workflow so that it will be tested moving forward

• https://github.com/OpenAPITools/openapi-generator/blob/master/.github/workflows/samples-kotlin-server.yaml
• https://github.com/OpenAPITools/openapi-generator/blob/master/.github/workflows/samples-kotlin-server-jdk17.yaml
• https://github.com/OpenAPITools/openapi-generator/blob/master/.github/workflows/samples-kotlin-server-jdk21.yaml

[andrewwilsonnew]

All good to go @wing328

[wing328]

FYI. Pushed a commit to update the docs, samples

[andrewwilsonnew]

Can you merge this or give me permissions @wing328 ?

[wing328]

just merged it. thanks for contributing a new generator.

i'll file a follow-up PR with minor enhancements shortly.

[wing328]

update: merged #20968 with minor enhancements