Add bookokrat (rothgar#415)

Author: bugzmanov

README.md

@@ -465,6 +465,7 @@
 <details open><summary><h2>Multimedia</h2></summary>
 
 - [asak](https://github.com/chaosprint/asak) A cross-platform audio recording/playback TUI.
+- [bookokrat](https://github.com/bugzmanov/bookokrat) Full-featured EPUB books reader with Vim keybindings.
 - [chafa](https://hpjansson.org/chafa/) A powerful utility that converts image data, including animated GIFs, into graphics formats or ANSI/Unicode character art suitable for display in a terminal.
 - [cmdpxl](https://github.com/knosmos/cmdpxl) Totally practical command-line image editor
 - [cmus](https://cmus.github.io/) A small, fast and powerful console music player for Unix-like operating systems.