feat: Display epub metadata on Recents (#511)

* **What is the goal of this PR?** Implement a metadata viewer for the
Recents screen
* **What changes are included?**

| Recents | Files |
| --- | --- |
| <img alt="image"
src="https://github.com/user-attachments/assets/e0f2d816-ddce-4a2e-bd4a-cd431d0e6532"
/> | <img alt="image"
src="https://github.com/user-attachments/assets/3225cdce-d501-4175-bc92-73cb8bfe7a41"
/> |

For the Files screen, I have not made any changes on purpose. For the
Recents screen, we now display the Book title and author. If it is a
file with no epub metadata like txt or md, we display the file name
without the file extension.

---

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

Although I went trough all the code manually and made changes as well,
please be aware the majority of the code is AI generated.

---------

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

src/activities/reader/XtcReaderActivity.cpp

@@ -45,7 +45,7 @@ void XtcReaderActivity::onEnter() {
   // Save current XTC as last opened book and add to recent books
   APP_STATE.openEpubPath = xtc->getPath();
   APP_STATE.saveToFile();
-  RECENT_BOOKS.addBook(xtc->getPath());
+  RECENT_BOOKS.addBook(xtc->getPath(), xtc->getTitle(), xtc->getAuthor());
 
   // Trigger first update
   updateRequired = true;