[Kword] Rewrite plugin in kotlin

[npresseault]

Description

Rewrite kword plugin in kotlin.
The gradle DSL also gets an update.

Gradle plugin DSL changed. All properties are now lazy.
Instead of

  translationFile = file("src/commonMain/resources/translations/translation.en.json")
  enumClassName = "com.mirego.sample.KWordTranslation"
  generatedDir = file("src/commonMain/generated")

Do this

  translationFile.set(file("src/commonMain/resources/translations/translation.en.json"))
  enumClassName.set("com.mirego.sample.KWordTranslation")
  generatedDir.set(file("src/commonMain/generated"))

Motivation and Context

Using kotlin will make it easier to maintain it. Aditionaly, we were using non lazy properties gradle which could result in non optimal gradle builds.

How Has This Been Tested?

Ran the plugin in the local kword sample.
Writing tests is something that would be a nice addition but it does require some additional setup to test the gradle task itself.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)