Add kotlin waits tests

[DNotNice]

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Added tests for Kotlin

Description

Added Kotlin code examples for the waits documentation, covering all the three waits

Motivation and Context

The Kotlin code example for the Waits section shows an empty field which doesn't look good for the webiste

Types of changes

• [x ] Change to the site (I have double-checked the Netlify deployment, and my changes look good)
• [ ]x Code example added (and I also added the example to all translated languages)
• [ x] Improved translation
• Added new translation (and I also added a notice to each document missing translation)

Checklist

• [x ] I have read the contributing document.
• [ x] I have used hugo to render the site/docs locally and I am sure it works.