initial weather-kotlin

[maxandersen]

initial start of a sample in kotlin (works already)

[maxandersen]

to try out just do mvn install and use jbang org.acme:weather-kotlin:1.0.0-SNAPSHOT:runner as command.

example vscode config:

{
    "servers": {
        "weather-kotlin": {
            "type": "stdio",
            "command": "jbang",
            "args": [
                "org.acme:weather-kotlin:1.0.0-SNAPSHOT:runner"
            ]
        }
    }
}

[kpavlov]

LGTM, good start, let's add tests and include in CI. It's to do it in separate pr

[kpavlov]

Constructor injection and final fields would probably be better

Suggested change

	class Weather {
	@RestClient
	lateinit var weatherClient: WeatherClient
	class Weather(
	@RestClient
	private val weatherClient: WeatherClient
	) {

[kpavlov]

Maven compiler should not be needed for kotlin-only build

[mkouba]

I would rather not add another sample/example app until #201 is resolved.

[kpavlov]

Tests indeed are needed, here they are #231

[kpavlov]

Let's also add .mvn/jvm.config file:

--add-opens=java.base/java.lang=ALL-UNNAMED
--add-opens=java.base/java.io=ALL-UNNAMED

[mkouba]

@maxandersen @kpavlov What's the status of this PR?