feat: Current page as QR (#1099)

## Summary

* **What is the goal of this PR?** Implements QR text of the current
page
* **What changes are included?**

## Additional Context

I saw this feature request at #982 
It made sense to me so I implemented. But if the team thinks it is not
necessary please let me know and we can close the PR.

| Page | Menu | QR |
|------|-------|----|
|
![IMG_6601.bmp](https://github.com/user-attachments/files/25473201/IMG_6601.bmp)
|
![IMG_6599.bmp](https://github.com/user-attachments/files/25473202/IMG_6599.bmp)
|
![IMG_6600.bmp](https://github.com/user-attachments/files/25473205/IMG_6600.bmp)
|


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### AI Usage


Did you use AI tools to help write this code? _** YES

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Co-authored-by: Eliz Kilic <elizk@google.com>

lib/I18n/translations/english.yaml

@@ -285,6 +285,7 @@ STR_GO_TO_PERCENT: "Go to %"
 STR_GO_HOME_BUTTON: "Go Home"
 STR_SYNC_PROGRESS: "Sync Progress"
 STR_DELETE_CACHE: "Delete Book Cache"
+STR_DISPLAY_QR: "Show page as QR"
 STR_CHAPTER_PREFIX: "Chapter: "
 STR_PAGES_SEPARATOR: " pages  |  "
 STR_BOOK_PREFIX: "Book: "