* This commit addresses the scenario where, for any reason, shared preferences and the database are retained on the device, and the list of ZIM files is visible in the library. However, the `MANAGE_EXTERNAL_PERMISSION` is not found, and when a user attempts to open a file, the application lacks the necessary permission. To improve this scenario, we now prompt the user for permission if it is not available when opening ZIM files from the library.
* Additionally, enhanced the behavior of the swipe refresh layout if the user clicks on the "NO" button in the permission dialog.
* We are using the `applicationContext` to start the `ErrorActivity`, which is outside the `Activity`. Therefore, to initiate the activity with an external context of the `Activity`, we must include the `FLAG_ACTIVITY_NEW_TASK` flag in the intent. Without this flag, the activity will not start.
* Introduced the 'Support kiwix' option, which is configurable in the navigation for custom apps. If the custom app is set to display the "Support" menu item in navigation, it will be shown; otherwise, it will be hidden from the app.
* Replaced the "kiwix" and "the" prefixes in "Support kiwix" and "About the app" with the app name in the navigation.
* The getEntryByPath method was being called twice when retrieving content. Consequently, the initial call returned the content entry URL with additional parameters. Subsequently, when making the second call with the provided URL, it resulted in an "entry not found" exception. This issue prevented the loading of the CSS and content of the Zim file.
* Additionally, the getActualUrl method was primarily implemented to retrieve the redirect entry of the URL provided by the webView. It is unnecessary to invoke this method when obtaining content.
* Introduced test cases for the new functionality to ensure its expected behavior in both variants, such as Play Store and non-Play Store.
* Updated other test cases to accommodate the testing of this new functionality.
* If the custom app is configured to display the 'About the app' option in navigation, it will be visible. Clicking on it will redirect the user to the configured URL.
* Scan the app-specific directory as well because we have limitations in scanning all directories on Android 11 and above in the Play Store variant. If a user copies the ZIM file to the app-specific directory on the SD card, the scanning of the app-specific directory on the SD card has not been added, resulting in the copied files not being displayed on the library screen. Therefore, we need to explicitly include the app-specific directory for scanning.
