[ko] Korean Translation for README.md (#434)

* Translate - 1-4connect-internet

* Translate - 1-4 connect-internet

* translate lesson 1-4

* word refactoring

* word refactoring

* modified link

* Korean translation

* Korean translation

* korean translation

* modified sentence

* korean translation

* korean translation - pedagogy, hardware

* Create README.ko.md

* Update README.ko.md

* Update README.md

* Delete README.ko.md

* Delete README.ko.md

* Delete pi-speech-to-text.ko.md

* Delete assignment.ko.md

* Update README.ko.md

Co-authored-by: eomhojeong <[email protected]>
Co-authored-by: Jim Bennett <[email protected]>
Co-authored-by: jhYun505 <[email protected]>

Author: 4 people

README.md

@@ -12,6 +12,7 @@
 [![Chinese](https://img.shields.io/badge/-Chinese-yellow)](translations/README.zh-cn.md)
 [![Turkish](https://img.shields.io/badge/-Turkish-darkgreen)](translations/README.tr.md)
 [![French](https://img.shields.io/badge/-French-purple)](translations/README.fr.md)
+[![Korean](https://img.shields.io/badge/-Korean-white)](translations/README.ko.md)
 [![Japanese](https://img.shields.io/badge/-Japanese-red)](translations/README.ja.md)
 
 # IoT for Beginners - A Curriculum