[REQ][kotlin-spring] add gradle wrapper to generated code

[takkiraz]

Currently the gradle wrapper is missing in the generated code. Is there a reason for this?
I would like to create a PR to add the Gradle wrapper to the generated code.

[wing328]

we welcome a PR from you to add it

let us know if you need any help with the PR

have a nice weekend

[DavidGrath]

@takkiraz I see you've added the samples already. Do you want to check out what I've done on the codegen part?

[DavidGrath]

#20341

[takkiraz]

@DavidGrath Thanks for the PR. Unfortunately I haven't had time the last few days.
@wing328 Does the Community Slack still exist? The links on the website are no longer valid.

[wing328]

can you please try https://join.slack.com/t/openapi-generator/shared_invite/zt-2wmkn4s8g-n19PJ99Y6Vei74WMUIehQA ?