update: add Multik to Kotlin for DS page (JetBrains#2095)

* Updated Kotlin for Data Science landing page:
reworked text, removed Zeppelin building from source instructions, removed banner image, etc.

* Update pages/docs/reference/data-science-overview.md

Co-authored-by: Pavel Semyonov <42832629+p7nov@users.noreply.github.com>

* Update pages/docs/reference/data-science-overview.md

Co-authored-by: Pavel Semyonov <42832629+p7nov@users.noreply.github.com>

* Update pages/docs/reference/data-science-overview.md

Co-authored-by: Pavel Semyonov <42832629+p7nov@users.noreply.github.com>

* Update pages/docs/reference/data-science-overview.md

Co-authored-by: Pavel Semyonov <42832629+p7nov@users.noreply.github.com>

* Update pages/docs/reference/data-science-overview.md

Co-authored-by: Pavel Semyonov <42832629+p7nov@users.noreply.github.com>

* Replaced "ETL pipelines" with "data pipelines", moved "easy to learn" to the first position in the list, and removed pages/docs/tutorials/zeppelin-spark-cluster.md

* Added Multik 0.0.1 to the list of libraries

Co-authored-by: Pavel Semyonov <42832629+p7nov@users.noreply.github.com>

Author: MKhalusova

docs/topics/data-science-overview.md

@@ -41,6 +41,9 @@ The ecosystem of libraries for data-related tasks created by the Kotlin communit
 Here are some libraries that you may find useful:
 
 ### Kotlin libraries
+* [Multik](https://github.com/Kotlin/multik): multidimensional arrays in Kotlin. The library provides Kotlin-idiomatic, 
+  type- and dimension-safe API for mathematical operations over multidimensional arrays. Multik offers swappable 
+  JVM and native computational engines, and a combination of the two for optimal performance.
 
 * [kotlin-statistics](https://github.com/thomasnield/kotlin-statistics) is a library providing extension functions for 
 exploratory and production statistics. It supports basic numeric list/sequence/array functions (from `sum` to `skewness`),