Data Structures Preview is out 🤟

[y9vad9]

Hola, everyone 👋
I've just added a few updates to the course, let's sum it up:
• Added preview of data structure block (linked PR)
• Added blog and first article about Extension Oriented Design in English and Ukrainian (linked PR)
• Links are improved (there is no more block-1/intro, but kotlin/basics/intro; linked PR)
• Some swearing in Ukrainian added for error messages 👀

I will be delighted to see your feedback about new updates (to make the course better), so you're welcome.

[LilBroice]

Pretty good course with interesting serving but personaly I would add some explanation to the code text. Thats not hard but it may help to remember terminology.

[y9vad9]

I've added also topic about Strings and Chars #86