Add Resume Reading FAB Manga screen (#59)

* Added the Floating action button to Resume to the last read chapter

- When a chapter is marked as read/unread the lastPageRead is changed to 1,
Also fixed a bug which made the boolean expression appear in the ui
Also removed some unused Styles

Added the Resume/Start Button

* changed a Resume button to a React compnent

* Update src/screens/Manga.tsx

Co-authored-by: Sascha Hahne <ntbm@users.noreply.github.com>

* Update src/screens/Manga.tsx

Co-authored-by: Sascha Hahne <ntbm@users.noreply.github.com>

Co-authored-by: Sascha Hahne <ntbm@users.noreply.github.com>

src/typings.d.ts

@@ -70,6 +70,7 @@ interface IChapter {
     read: boolean
     bookmarked: boolean
     lastPageRead: number
+    lastReadAt: number
     index: number
     fetchedAt: number
     chapterCount: number