template for future Flipper Zero applications

this template is based on two articles:

1. https://amperka.ru/blogs/projects/flipper-zero-app-programming-tutorial
2. https://yakovlev.me/hello-flipper-zero/

I express my great gratitude to the authors of these articles.

You can read more about using this code in my articles:

1. https://habr.com/ru/articles/747152/ (in English)
2. https://habr.com/ru/articles/742428/ (in Russian)