Tutorial 1: FP, Haskell projects - init (#1)

* Init from MarekSuchanek/FPCourse + revisit

* More info about JS and Haskell

* Prepare improvements about Stack

* Dependencies in Stack

* package.yaml dependencies

* Information about conversions

* MI-PSL (Scala) link added

* Typos correction

Removed typos, misspellings, improved words and formulations thanks to Grammarly.

* Fix Haskell syntax highlight

Author: MarekSuchanek