chore: update README.md

Author: nvmnghia

README.md

@@ -0,0 +1,17 @@
+# yacv
+
+yet another comic viewer
+
+## Screenshots
+
+| Library view                          | Folder view                         | Comic view                        |
+|:-------------------------------------:|:-----------------------------------:|:---------------------------------:|
+| ![library](./screenshots/library.jpg) | ![folder](./screenshots/folder.jpg) | ![comic](./screenshots/comic.jpg) |
+
+## Goals
+
+- Read `CBZ` + `CBR`
+- Metadata editing
+- Material Design
+- Large image/file optimization
+- 80% test coverage