[Kotlin] Add Content (screencast, courses) (#4729)

* Add beginner youtube tutorial by freecodeCamp

* Add two kotlin courses

* Update format convention - fix author credit

* Update free-courses-en.md

Co-authored-by: Seth <seth@elypia.org>

* Move existing course from android to kotlin section

Co-authored-by: Seth <seth@elypia.org>

free-courses-en.md

@@ -35,6 +35,7 @@
   * [Redux](#redux)
   * [Sails.js](#sailsjs)
   * [Vue.js](#vuejs)
+* [Kotlin](#kotlin)
 * [Kubernetes](#kubernetes)
 * [Linux](#linux)
 * [Lua](#lua)
@@ -87,7 +88,6 @@
 * [Android Developer Fundamentals (Version 2) — Codelab](https://developer.android.com/courses/fundamentals-training/toc-v2)
 * [Android Developer Fundamentals (Version 2) — Concepts](https://google-developer-training.github.io/android-developer-fundamentals-course-concepts-v2/index.html)
 * [CS50 2019 - Android Track](https://www.youtube.com/playlist?list=PLhQjrBD2T381qULidYDKP55-4u1piASC1) - David J. Malan (Harvard OpenCourseWare)
-* [Developing Android Apps with Kotlin](https://www.udacity.com/course/developing-android-apps-with-kotlin--ud9012) (Udacity)
 * [Learn how to program: Android](https://www.learnhowtoprogram.com/android) - Epicodus Inc.
 * [Material design](https://material.io/guidelines/)
 * [Programming Cloud Services for Android Handheld Systems](https://www.coursera.org/course/mobilecloudprogram)
@@ -377,6 +377,13 @@
 * [Vuex for Everyone](https://vueschool.io/courses/vuex-for-everyone)
 
 
+### Kotlin
+
+* [Android Kotlin Tutorial: Create Android Apps using Kotlin](https://www.youtube.com/playlist?list=PLlxmoA0rQ-Lw5k_QCqVl3rsoJOnb_00UV) - Sriyank Siddhartha (YouTube)
+* [Developing Android Apps with Kotlin](https://www.udacity.com/course/developing-android-apps-with-kotlin--ud9012) (Udacity)
+* [Kotlin Bootcamp for Programmers](https://www.udacity.com/course/kotlin-bootcamp-for-programmers--ud9011) - Aleks Haecky, Asser Samak, Sean McQuillan (Udacity)
+
+
 ### Kubernetes
 
 * [Learn Kubernetes](https://www.katacoda.com/courses/kubernetes) - Katacoda

free-podcasts-screencasts-en.md

@@ -192,6 +192,7 @@
 
 ### Kotlin
 
+* [freeCodeCamp - Tutorial for Beginners](https://www.youtube.com/watch?v=F9UC9DY-vIU) - Nate Ebel (screencast)
 * [Kotlin Beginners Tutorials](https://www.youtube.com/playlist?list=PLpg00ti3ApRweIhdOI4VCFFStx4uXC__u) (screencast)
 * [Talking Kotlin](http://talkingkotlin.com) (podcast)