Creating a very simple text editing application on macOS

I will commission the development of a very simple text editor for macOS. The application should be created in Swift (preferred) or possibly React + Electron. I will provide the willing contractor with the interface design and all necessary styling information.

The app is basically a text entry box without any styling (bold, lists, italics, etc.) with the ability to export to .PDF and .TXT files. Plus a line/word/character counter, switch interface modes (light, dark), switch font (about 4-6 fonts) and text size. The application must integrate with macOS - the various functions should be accessible from the bar menu, as well as allow you to open a .txt file in the application (option open in...). The application must also be as efficient as possible - it is a word processor. Detailed requirements described in "Required features".