feat: Add Jodel support (#462)

[xyrolaith]

I have never done any Kotlin programming before so please double check.
Also the invoke function could probably use some extra validations.

Fixes #462

[svenjacobs]

Thanks, this looks really good for your first Kotlin code 🙌🏼

Please run ./gradlew formatKotlin once to format the code according to our formatting rules. Thanks.

[xyrolaith]

The formatting seems to be ok now but the test throws an error as the JSON part requires additional mocking which I am unfamiliar with.

[svenjacobs]

I will have a look 👀

[svenjacobs]

JSONObject is from the Android framework and thus is missing an implementation in unit tests, because unit tests don't run on Android devices. Mocking JSONObject doesn't make sense because then the whole test doesn't make sense. We would test a mocked object. So I'm using KotlinX Serialization now to parse the JSON.

[svenjacobs]

@all-contributors please add @xyrolaith for code

[allcontributors]

@svenjacobs

I've put up a pull request to add @xyrolaith! 🎉

[svenjacobs]

@all-contributors please add @xyrolaith for ideas

[allcontributors]

@svenjacobs

I've put up a pull request to add @xyrolaith! 🎉