Readme
https://www.dhmi.gov.tr/Sayfalar/Sozluk.aspx?Tip=KSLT
https://www.skybrary.aero/index.php?title=Category:General&pageuntil=Example+article#mw-pages
https://www.att.com/support_media/images/pdf/Country_Code_List.pdf
Recyclerview -searchview
https://www.youtube.com/watch?v=op2rBiJb79A
https://www.youtube.com/watch?v=-41e7nYnhj8